presto-main/src/main/java/io/prestosql/operator/scalar/MapNotEqualOperator.java/MapNotEqualOperator/notEqual
class MapNotEqualOperator:    @TypeParameter("K")
    @TypeParameter("V")
    @SqlNullable
    @SqlType(StandardTypes.BOOLEAN)
    public static Boolean notEqual(
            @OperatorDependency(operator = EQUAL, argumentTypes = {"K", "K"}) MethodHandle keyEqualsFunction,
            @OperatorDependency(operator = HASH_CODE, argumentTypes = "K") MethodHandle keyHashcodeFunction,
            @OperatorDependency(operator = EQUAL, argumentTypes = {"V", "V"}) MethodHandle valueEqualsFunction,
            @TypeParameter("K") Type keyType,
            @TypeParameter("V") Type valueType,
            @SqlType("map(K,V)") Block left,
            @SqlType("map(K,V)") Block right)
    {
        Boolean equals = MapEqualOperator.equals(keyEqualsFunction, keyHashcodeFunction, valueEqualsFunction, keyType, valueType, left, right);
        if (equals == null) {
            return null;
        }

        return !equals;
    }