public void externalAdded(Address extAddr) {
		if (ignoreChanges) {
			return;
		}
		if (extAddr != null) {
			byteTasks.notifyAdded(extAddr);
		}
		else {
			byteTasks.notifyAdded(new AddressSet(AddressSpace.EXTERNAL_SPACE.getMinAddress(),
				AddressSpace.EXTERNAL_SPACE.getMaxAddress()));
		}
	}
Identify external addresses which need to be analyzed
NOTE: This is a convenience method for blockAdded
@param extAddr external address or null for all externals
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/analysis/AutoAnalysisManager.java