private boolean isFidFunction(Function function) {

		Address address = function.getEntryPoint();

		BookmarkManager bm = program.getBookmarkManager();

		Bookmark bookmark = bm.getBookmark(address, BookmarkType.ANALYSIS, "Function ID Analyzer");

		if (bookmark == null) {
			return false;
		}
		return true;
	}
Method to determine if the given function is a "FID" function or one that has had function
signature assigned by the FID (Function ID) Analyzer
@param function the given function
@return true if function is a FID function, false otherwise
Ghidra/Features/Decompiler/ghidra_scripts/classrecovery/RecoveredClassHelper.java