我试图弄清楚如何在EXT JS中合并这样的行单元格。任何人都可以提供一个例子吗？
Customer | Product | QTY | Model | Price
++++++++++++++++++++++++++++++++++++++++++++++++++++
| | 2 | 2 | 100
Acme | Mixer | 1 |17 | 200
| | 2 |33 | 50
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| | 1 | 2 | 10
Toro | Mower | 4 |14 | 20
| | 3 |31 | 5
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