The permissions sets of the caller class and its ancestors (that is, all stack frames above this one) are not included in computing the intersection set.
调用类和它的上级（即所有在它上面的堆栈帧）的权限集都不包括在交集计算中。
The permissions sets of the caller class and its ancestors (that is, all stack frames above this one) are not included in computing the intersection set.
调用类和它的上级（即所有在它上面的堆栈帧）的权限集都不包括在交集计算中。
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