comefrom: <awangdev>Submatrix Sum_1.java
code: private boolean validateInput(int[][] nums) {
  
          if (nums == null || nums.length == 0 || nums[0] == null || nums[0].length == 0) {
              return true;
          }
          return false;
      }
masked: private boolean var_0 ( int [ ] [ ] var_1 ) {
    if ( var_1 == null || var_1 . length == 0 || var_1 [ 0 ] == null || var_1 [ 0 ] . length == 0 ) {
      return true ;
    }
    return false ;
  }
  