public void init() {
		initializeSymbolTables();
		initializeExternalManagers();
		initializeMessages();
		initializeChangeSets();
		initializeProgramMerges();
		initializeConflictSets();

		originalToLatestHash = new LongLongHashtable();
		latestToOriginalHash = new LongLongHashtable();
		originalToMyHash = new LongLongHashtable();
		myToOriginalHash = new LongLongHashtable();
	}
Manages changes and conflicts for externals between the latest versioned
program and the modified program being checked into version control.
@param listingMergeManager the top level merge manager for merging a program version.
@param showListingPanel true to show the listing panel.
Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ExternalFunctionMerger.java