@Override
	public String getComment() {
		if (record != null) {
			return record.getString(ComponentDBAdapter.COMPONENT_COMMENT_COL);
		}
		return null;
	}
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