boolean containsOffset(int off) {
		if (off == offset) { // separate check required to handle zero-length case
			return true;
		}
		return off > offset && off < (offset + length);
	}
Get record key
@return record key or -1 for undefined component without a record
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/data/DataTypeComponentDB.java