@Override
	public boolean isEditable(DataType dt) {
		throw new UnsupportedOperationException();
	}
A stub of the {@link DataTypeManagerService} interface.  This can be used to supply a test values 
or to spy on system internals by overriding methods as needed.
Ghidra/Features/Base/src/test/java/ghidra/app/services/TestDoubleDataTypeManagerService.java