@Override
	public int getLength() {
		return storageSize;
	}
Clone this bitfield to a new datatype manager.  This may change the effective bit
size and storage size of the resulting datatype based upon the data organization
of the specified dtm.
@param dtm target datatype manager
@return new instance or same instance of dtm is unchanged.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/BitFieldDataType.java