private static ExternalMatchType testExternalMatch(ExternalLocation extLoc1,
			ExternalLocation extLoc2) {
		ExternalMatchType matchType = testExternalNameMatch(extLoc1, extLoc2);
		if (matchType == ExternalMatchType.NONE) {
			return hasExternalAddressMatch(extLoc1, extLoc2) ? ExternalMatchType.ADDRESS
					: ExternalMatchType.NONE;
		}
		return matchType;
	}
Generate relative rank when a non-default name match occurs.
Method should not be invoked when either location symbol has a default source type.
@param targetAddr
@param targetNamespace
@param targetName
@param targetOrigImportedName
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/util/SimpleDiffUtility.java