comefrom: <awangdev>766. Toeplitz Matrix_1.java
code: private boolean check(int x, int y, int[][] matrix) {
  
          int n = matrix.length, m = matrix[0].length;
          for (int i = x, j = y; i < n && j < m; i++, j++) {
              if (matrix[i][j] != matrix[x][y]) return false;
          }
          return true;
      }
masked: private boolean var_0 ( int var_1 , int var_2 , int [ ] [ ] var_3 ) {
    int var_5 = var_3 . length , var_7 = var_3 [ 0 ] . length ;
    for ( int var_8 = var_1 , var_9 = var_2 ;
    var_8 < var_5 && var_9 < var_7 ;
    var_8 ++ , var_9 ++ ) {
      if ( var_3 [ var_8 ] [ var_9 ] != var_3 [ var_1 ] [ var_2 ] ) return false ;
    }
    return true ;
  }
  