@Override
	public String[][] getPhases() {
		return new String[][] { EXTERNAL_PROGRAM_PHASE };
	}
Actually merges (sets or removes) the indicated external program name in
program1 based on the same external program name in program2
@param program1 the program to merge into.
@param program2 the program to get the merge information from.
@param idGroup the symbol ID group for the external program (Library) to merge.
@param monitor task monitor for feedback or canceling the merge.s
Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ExternalProgramMerger.java