presto-main/src/main/java/io/prestosql/operator/scalar/ElementToArrayConcatFunction.java/ElementToArrayConcatFunction/ElementToArrayConcatFunction
class ElementToArrayConcatFunction:    public ElementToArrayConcatFunction()
    {
        super(new FunctionMetadata(
                new Signature(
                        FUNCTION_NAME,
                        ImmutableList.of(typeVariable("E")),
                        ImmutableList.of(),
                        arrayType(new TypeSignature("E")),
                        ImmutableList.of(new TypeSignature("E"), arrayType(new TypeSignature("E"))),
                        false),
                false,
                ImmutableList.of(
                        new FunctionArgumentDefinition(false),
                        new FunctionArgumentDefinition(false)),
                false,
                true,
                "Concatenates an element to an array",
                SCALAR));
    }