reduceL1 method
Implementation
MLOperand reduceL1(MLOperand input, [MLReduceOptions? options]) =>
    js_util.callMethod(this, 'reduceL1', [input, options]);MLOperand reduceL1(MLOperand input, [MLReduceOptions? options]) =>
    js_util.callMethod(this, 'reduceL1', [input, options]);