元表、元字段和名称调用方法。 ## 可用函数 Returns a raw metafield value from the target metatable. target may be any value, and field must be a string. The function does not call the metafield, does not invoke \_\_index lookup, and returns nil when the metatable or field is missing. 返回存储在 the current namecall method 中的 current Luau namecall atom。该 function 不接受 arguments，并返回 exactly one value。如果 the current namecall method 存在、the current namecall method 大于 0，并且 the current namecall method 为 non-null，它会用 string return 把该 data 作为 string push。否则 push nil。function 不检查 arguments，不从 target object 计算 method name，也不调用任何 metamethod。get\_namecall\_method 是 getnamecallmethod 的 alias。 Returns the metatable currently attached to a target value, or nil when none is present. The function returns exactly one value and does not change the target. debug.getmethods is an alias for getrawmethods. Returns whether the target value has a non-nil raw metafield with the requested name. The function does not call the metafield, does not invoke \_\_index lookup, and does not change readonly state. Returns whether the target value has a metatable. The function returns one boolean and does not return or change the metatable itself. Returns whether a table is readonly. The argument must be a table, and the function does not change it. Marks a table as readonly and returns no values. Marks a table as writable and returns no values. Replaces the current namecall method string when a current namecall method exists. The method argument must be a string. If no current namecall method exists, the call returns no values and does not create one. set\_namecall\_method is an alias. Sets the metatable for a target value and returns the original target. metatable must be a table or nil; nil clears the metatable. debug.setmethods is an alias for setrawmethods. Sets whether a table is readonly and returns no values.