Adds an item into the map. A third parameter may be used to set the priority of the item within the map. Priority is primarily used during when flattening the map into an array where order may be and important factor of the key-value pairs within the array.
Appends an item into the list at the end of the specified priority. The position of the added item may not be at the end of the list.
Adds an item into the map.
Appends an item at the end of the list.
Adds an item into the map.