comefrom: <awangdev>Number Of Corner Rectangles_1.java
code: private boolean validate(int[][] grid) {
  
          return grid == null || grid.length == 0 || grid[0] == null || grid[0].length == 0;
      }
masked: private boolean var_0 ( int [ ] [ ] var_1 ) {
    return var_1 == null || var_1 . length == 0 || var_1 [ 0 ] == null || var_1 [ 0 ] . length == 0 ;
  }
  