presto-main/src/main/java/io/prestosql/type/DecimalInequalityOperators.java/DecimalInequalityOperators/equalityOperator
class DecimalInequalityOperators:    private static SqlScalarFunction equalityOperator(OperatorType operatorType, MethodHandle getResultMethodHandle)
    {
        return makeBinaryOperatorFunctionBuilder(operatorType)
                .nullableResult(true)
                .choice(choice -> choice
                        .nullableResult(true)
                        .implementation(methodsGroup -> methodsGroup
                                .methods("boxedShortShort", "boxedLongLong")
                                .withExtraParameters(constant(getResultMethodHandle))))
                .build();
    }