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edu.cmu.side.plugin.FeaturePlugin.extractFeatureHitsForSubclass(Ledu/cmu/side/model/data/DocumentList;)Ljava/util/Collection;
java.lang.AbstractMethodError: edu.cmu.side.plugin.FeaturePlugin.extractFeatureHitsForSubclass(Ledu/cmu/side/model/data/DocumentList;)Ljava/util/Collection;	at edu.cmu.side.plugin.FeaturePlugin.extractFeatureHits(FeaturePlugin.java:34)	at com.david.bow.service.LightSideService.buildFeatureTable(LightSideService.java:268)	at com.david.bow.service.LightSideService.prepareBuildFeatureTable(Unknown Source)	at com.david.bow.lightSide.LAH_segment.predictSectionType(LAH_segment.java:3459)	at com.david.bow.controller.TextSummaryController.textSummaryTest(TextSummaryController.java:99)	at com.david.bow.controller.TextSummaryController$$FastClassBySpringCGLIB$$912df307.invoke()	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:720)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)	at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655)	at com.david.bow.controller.TextSummaryController$$EnhancerBySpringCGLIB$$412318db.textSummaryTest()	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:832)	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:743)	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:961)	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:895)	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:967)	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:858)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:843)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:316)	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:126)	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:122)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:157)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:48)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:205)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:120)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:96)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:91)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:53)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:213)	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:176)	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:614)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1502)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1458)	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Unknown Source)