private void searchChildReferenceByName(ChildRow row, String name) {
		row.isVeryCommon = false;
		if (name == null) {
			return;
		}
		FidPopulateResult.Count count = childHistogram.get(name);
		if (count != null) {
			count.count += 1;
			row.isVeryCommon = count.isVeryCommon;
		}
		else {
			count = new FidPopulateResult.Count();
			count.count = 1;
			count.isVeryCommon = false;
			childHistogram.put(name, count);
		}
	}
Returns whether a function is external.
@param function the function
@return whether the function is external
Ghidra/Features/FunctionID/src/main/java/ghidra/feature/fid/service/FidServiceLibraryIngest.java