@Override
	public boolean applyTo(Program program) {
		CodeUnit cu = getCodeUnit(program);
		if (cu == null) {
			message = "No Instruction or Data found for address " + address.toString() +
				"  Is this address valid?";
			return false;
		}

		String updatedComment = CommentUtils.sanitize(comment);
		if (commentChanged(cu.getComment(commentType), updatedComment)) {
			cu.setComment(commentType, updatedComment);
		}
		return true;
	}
return true if the newValue and oldValue are different
@param newValue a String containing the new comment
@param oldValue a String containing the old comment
@return true if newValue and oldValue are different.
Ghidra/Features/Base/src/main/java/ghidra/app/cmd/comments/SetCommentCmd.java