In the second case of we've used a special wild card pattern to match a List of any size, even zero elements, and any element values.
在第二个case里我们使用了一个特殊的通配符来匹配一个任意大小的List，甚至0个元素，任何元素的值都行。
A wild-card consisting of two asterisks matches zero or more whole nodes and can be used at the beginning, middle, or end of a name. Valid examples include.
由两个星号构成的通配符将匹配零个或多个节点，并且可以在名称的开头、中间或结尾使用。
A wild-card consisting of two asterisks matches zero or more whole nodes and can be used at the beginning, middle, or end of a name. Valid examples include.
由两个星号构成的通配符将匹配零个或多个节点，并且可以在名称的开头、中间或结尾使用。
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