anchor.diff:          {'code': 'BOS', 'Tmin': 30},
           {'code': 'BOS', 'Tmin': 31},
         ];
  -      Table t1 = new Table.from(rows);
  -      Table t = t1.rbind(t1);
  +      var t1 = Table.from(rows);
  +      var t = t1.rbind(t1);
         expect([t.nrow, t.ncol], [4, 2]);
         // change t1 and check if t changes
         t1.column(1).data[0] = 100;
  
positive.code:         {'code': 'BOS', 'Tmin': 30, 'Tmax': 95},
          {'code': 'BWI', 'Tmin': 32, 'Tmax': 100}
        ];
        Table t = new Table.from(rows);
        t..removeColumn('Tmin')..removeColumn('Tmax');
        expect(t.ncol, 1);
      });
  
negative.code:         {'code': 'BOS', 'value': 2},
          {'Tmin': 24, 'code': 'BOS'}
        ];
        var t = Table.from(rows, colnamesFromFirstRow: false);
        expect(t.nrow, 2);
        expect(t.ncol, 3);
        expect(t.colnames, ['code', 'value', 'Tmin']);
  