private String getComment(Address addr, CommentType commentType) throws IOException {
		DBRecord record = commentAdapter.getRecord(addrMap.getKey(addr, false));
		if (record != null) {
			return record.getString(commentType.ordinal());
		}
		return "";
	}
Get the comment history for the comment type at the given address 

@param addr address for the comment history
@param commentType comment type
@return zero length array if no history exists
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/code/CodeManager.java