add a single item at the end of a collection
| std::pop | remove and return the last item of a collection |
| std::peek | returns the last item of a collection without removing it |
| std::drop | removes the last item of a collection without returning it |
| std::put | adds a single item at the front of a collection |
| std::append | appends two or more collections to form a single collection |
| std_types::list | adds a single item at the end of the list |
| std_types::octet_string | adds a single character at the front of the string |
| std_types::quad_octet_string | adds a single character at the front of the string |