@Override
  public String getName() {
    return FUNCTION_NAME;
  }
@Test
  public void testMultiplicationNullLiteral() {
    ExpressionContext expression = RequestContextUtils.getExpression(String.format("mult(null, 0)"));
    TransformFunction transformFunction = TransformFunctionFactory.get(expression, _dataSourceMap);
    Assert.assertTrue(transformFunction instanceof MultiplicationTransformFunction);
    Assert.assertEquals(transformFunction.getName(), "mult");
    double[] expectedValues = new double[NUM_ROWS];
    RoaringBitmap roaringBitmap = new RoaringBitmap();
    roaringBitmap.add(0L, NUM_ROWS);
    testTransformFunctionWithNull(transformFunction, expectedValues, roaringBitmap);
  }