@Override
	public void apply() {
		conflictOption = conflictPanel.getSelectedOptions();

		// If the "Use For All" check box is selected
		// then save the option chosen for this conflict type.
		if (conflictPanel.getUseForAll()) {
			externalProgramChoice = conflictOption;
		}
	}
Returns an array of symbol ID groups for all the external programs that are in conflict.
Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ExternalProgramMerger.java