int convertFiltersToSymbolIndex(int symbolFilter, int primaryFilter) {
		switch (symbolFilter) {
			case ProgramMergeFilter.IGNORE:
			default:
				return 0; // Ignore
			case ProgramMergeFilter.REPLACE:
				return 1; // Replace
			case ProgramMergeFilter.MERGE:
				if (primaryFilter == ProgramMergeFilter.REPLACE) {
					return 3; // Merge 2 (Set Primary as in Program 2)
				}
				return 2; // Merge 1 (Set Primary as in Program 1)
		}
	}
Gets the standard index number of a StringEnum for the "Symbols" option for the indicated 
filter values of the symbols apply filter and primary symbol filter.
@param symbolFilter the ProgramMergeFilter.SYMBOLS filter.
@param primaryFilter the ProgramMergeFilter.PRIMARY_SYMBOL filter.
@return the index for setting the StringEnum to the value associated with the filter values.
Ghidra/Features/ProgramDiff/src/main/java/ghidra/app/plugin/core/diff/DiffApplySettingsOptionManager.java