private void initializeSymbolTables() {
		symbolTables[LATEST] = programs[LATEST].getSymbolTable();
		symbolTables[MY] = programs[MY].getSymbolTable();
		symbolTables[ORIGINAL] = programs[ORIGINAL].getSymbolTable();
		symbolTables[RESULT] = programs[RESULT].getSymbolTable();
	}
Determine the type of changes to the symbols in the LATEST and MY (CheckedOut) program.
Changes can be symbol removed, added, changed, renamed, and set to primary.
@param monitor task monitor for displaying progress to the user
@throws CancelledException if the user cancels the merge.
Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ExternalFunctionMerger.java