Tests to see if all of the given property names are owned by the specified object.This function is valid in v2.8.0 to v2.14.3. This function has been downloaded 3 times.
null, a partial function waiting for this value will be returned. Otherwise this will be the object from which the specified keys will be deleted.
nullthis will be a partial function which will simply accept the given
obj. The return value of the partial function is the same as the return value of this function in the case that
null. If all of the keys are owned by
truewill be returned, otherwise
This function requires the following function which is included automatically: