public void decode(Decoder decoder, PcodeFactory factory) throws DecoderException {
		vn = Varnode.decode(decoder, factory);
		dt = factory.getDataTypeManager().decodeDataType(decoder);
		int rankel = decoder.openElement(ElementId.ELEM_RANK);
		rank = (int) decoder.readSignedInteger(AttributeId.ATTRIB_VAL);
		decoder.closeElement(rankel);
	}
Decode a ParamMeasure object from the stream.
@param decoder is the stream decoder
@param factory pcode factory
@throws DecoderException for an invalid encoding
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/pcode/ParamMeasure.java