private boolean hasUserOrImportedSymbols(Function function) {
		Program program = function.getProgram();
		SymbolTable symbolTable = program.getSymbolTable();
		SymbolIterator symbols = symbolTable.getSymbolsAsIterator(function.getEntryPoint());
		for (Symbol symbol : symbols) {
			SourceType sourceType = symbol.getSource();
			if (sourceType == SourceType.USER_DEFINED || sourceType == SourceType.IMPORTED) {
				return true;
			}
		}
		return false;
	}
Returns true if there are symbol names at the function entry point that were either
created by a user or an importer. (i.e trusted)
@param function the function to test for trusted symbols
@return true if there are symbol names at the function entry point that were either
Ghidra/Features/FunctionID/src/main/java/ghidra/feature/fid/cmd/ApplyFidEntriesCommand.java