Caused by: java.lang.NullPointerException
at com.sun.beans.TypeResolver.resolve(TypeResolver.java:203)
at com.sun.beans.TypeResolver.resolve(TypeResolver.java:218)
at com.sun.beans.TypeResolver.resolve(TypeResolver.java:169)
at com.sun.beans.TypeResolver.resolve(TypeResolver.java:218)
at com.sun.beans.TypeResolver.resolveInClass(TypeResolver.java:96)
at java.beans.FeatureDescriptor.getParameterTypes(FeatureDescriptor.java:387)
at java.beans.MethodDescriptor.setMethod(MethodDescriptor.java:114)
at java.beans.MethodDescriptor.<init>(MethodDescriptor.java:72)
at java.beans.MethodDescriptor.<init>(MethodDescriptor.java:56)
at java.beans.Introspector.getTargetMethodInfo(Introspector.java:1150)
at java.beans.Introspector.getBeanInfo(Introspector.java:416)
at java.beans.Introspector.getBeanInfo(Introspector.java:163)
at groovy.lang.MetaClassImpl$15.run(MetaClassImpl.java:2924)
at java.security.AccessController.doPrivileged(Native Method)
at groovy.lang.MetaClassImpl.addProperties(MetaClassImpl.java:2922)
at groovy.lang.MetaClassImpl.initialize(MetaClassImpl.java:2905)