定义大小上限，若在选择多个对象时超过该大小，则无法编辑数组。
该值控制在检视面板中进行多对象编辑期间可以编辑的数组的最大大小。如果选择的游戏对象共享大于此值的数组，则检视面板将显示一个空数组。
在 Unity 5.5 之前，此值采用硬编码形式，无法更改。
为在性能和实用程序之间实现良好权衡，已选择 64 作为默认值。如果序列化对象通常具有大于此值的数组，则可以将此值设置为更高的数值，以允许对这些数组进行多重编辑。请注意，在编辑大型数组或大量对象时，设置过高的值可能会影响检视面板性能
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