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com.thoughtworks.xstream.mapper.CannotResolveClassException: grip:Pipeline	at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:81)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:55)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.PackageAliasingMapper.realClass(PackageAliasingMapper.java:88)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAliasingMapper.java:79)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.java:74)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.SecurityMapper.realClass(SecurityMapper.java:71)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)	at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper.java:47)	at com.thoughtworks.xstream.core.util.HierarchicalStreams.readClassType(HierarchicalStreams.java:29)	at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:133)	at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)	at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1230)	at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1214)	at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1085)	at edu.wpi.grip.core.serialization.Project.open(Project.java:118)	at edu.wpi.grip.core.serialization.Project.open(Project.java:97)	at edu.wpi.grip.ui.MainWindowController.lambda$openProject$5(MainWindowController.java:204)	at java.lang.Thread.run(Thread.java:745)