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java.lang.NullPointerException: 	at com.sun.tools.javac.processing.JavacMessager.printMessage(JavacMessager.java:113)	at com.sun.tools.javac.processing.JavacMessager.printMessage(JavacMessager.java:59)	at org.mule.devkit.apt.SilentMessager.error(SilentMessager.java:42)	at org.mule.devkit.apt.AbstractAnnotationProcessorContext.error(AbstractAnnotationProcessorContext.java:123)	at org.mule.devkit.apt.AbstractAnnotationProcessor.doProcess(AbstractAnnotationProcessor.java:438)	at org.mule.devkit.apt.AbstractAnnotationProcessor.process(AbstractAnnotationProcessor.java:124)	at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:793)	at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:722)	at com.sun.tools.javac.processing.JavacProcessingEnvironment.access$1700(JavacProcessingEnvironment.java:97)	at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1029)	at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1163)	at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1108)	at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:824)	at com.sun.tools.javac.main.Main.compile(Main.java:439)	at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:132)	at org.mule.devkit.maven.AbstractAnnotationProcessorMojo.callCompilationTask(AbstractAnnotationProcessorMojo.java:278)	at org.mule.devkit.maven.AbstractAnnotationProcessorMojo.executeWithExceptionsHandled(AbstractAnnotationProcessorMojo.java:213)	at org.mule.devkit.maven.AbstractAnnotationProcessorMojo.execute(AbstractAnnotationProcessorMojo.java:163)	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)	at org.apache.maven.lifecycle.internal.MojoExecutor.executeForkedExecutions(MojoExecutor.java:364)	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:198)	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)	at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)	at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)	at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)