@Override
	public Object getValue(MemBuffer buf, Settings settings, int length) {
		return null;
	}
Handle replacement of datatype which may impact bitfield datatype.

@param bitfieldComponent bitfield component
@param oldDt             affected datatype which has been removed or replaced
@param newDt             replacement datatype
@return true if bitfield component was modified
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/CompositeDataTypeImpl.java