private void clearConflictPanel() {
		try {
			SwingUtilities.invokeAndWait(new Runnable() {
				@Override
				public void run() {
					if (conflictPanel != null) {
						conflictPanel.clear();
					}
				}
			});
		}
		catch (InterruptedException e) {
			Msg.error(this, "Unexpected Exception: " + e.getMessage(), e);
		}
		catch (InvocationTargetException e) {
			Msg.error(this, "Unexpected Exception: " + e.getMessage(), e);
		}
	}
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