presto-main/src/main/java/io/prestosql/sql/planner/sanity/AllFunctionsResolved.java/AllFunctionsResolved/visitFunctionCall
class AllFunctionsResolved:        @Override
        protected Void visitFunctionCall(FunctionCall node, Builder<Symbol> context)
        {
            checkArgument(ResolvedFunction.fromQualifiedName(node.getName()).isPresent(), "Function call has not been resolved: %s", node);
            return super.visitFunctionCall(node, context);
        }