Type org.eclipse.emf.converter.ui.contribution.ModelConverterDescriptor of variable descriptor does not match with type java.lang.Object of variable item
Make classes org.eclipse.emf.converter.ui.contribution.ModelConverterDescriptor and java.lang.Object extend a common superclass
Type org.eclipse.emf.converter.ui.contribution.ModelConverterDescriptor of variable descriptor does not match with type java.lang.Object of variable item