presto-main/src/main/java/io/prestosql/operator/scalar/TryCastFunction.java/TryCastFunction/TryCastFunction
class TryCastFunction:    public TryCastFunction()
    {
        super(new FunctionMetadata(
                new Signature(
                        "TRY_CAST",
                        ImmutableList.of(castableToTypeParameter("F", new TypeSignature("T")), typeVariable("T")),
                        ImmutableList.of(),
                        new TypeSignature("T"),
                        ImmutableList.of(new TypeSignature("F")),
                        false),
                true,
                ImmutableList.of(new FunctionArgumentDefinition(false)),
                true,
                true,
                "",
                SCALAR));
    }