void clearMessages() {
		if (infoMsg.length() > 0) {
			infoMsg = new StringBuffer();
		}
		if (errorMsg.length() > 0) {
			errorMsg = new StringBuffer();
		}
	}
Get the informational messages that resulted from doing the merge.
@return String empty string if there were no information messages
generated during the merge.
Ghidra/Features/Base/src/main/java/ghidra/program/util/ProgramMergeManager.java