presto-main/src/main/java/io/prestosql/operator/scalar/InvokeFunction.java/InvokeFunction/InvokeFunction
class InvokeFunction:    private InvokeFunction()
    {
        super(new FunctionMetadata(
                new Signature(
                        "invoke",
                        ImmutableList.of(typeVariable("T")),
                        ImmutableList.of(),
                        new TypeSignature("T"),
                        ImmutableList.of(functionType(new TypeSignature("T"))),
                        false),
                true,
                ImmutableList.of(new FunctionArgumentDefinition(false)),
                true,
                true,
                "lambda invoke function",
                SCALAR));
    }