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setmetatableSYNOPSIS
setmetatable(table,metatable)
DESCRIPTION
Sets the metatable for the given table. (You cannot change the metatable of other types from Lua, only from
C.) If metatable is nil, removes the metatable of the given table.
RETURN VALUE
This function returns table.
ERRORS
If the original metatable has a "__metatable" field, raises an error.