code: public SDVariable normmax(String name, SDVariable x, int... dimensions) {
          return normmax(name, x, false, dimensions);
      }
docs: Max norm (infinity norm) reduction operation: The output contains the max norm for each tensor/subset along the
  specified dimensions
  
  @param name       Output variable name
  @param x          Input variable
  @param dimensions dimensions to reduce over
  @return Output variable