def procmap(method, item_list):
    """
    Like map(), but where the method being applied has no return value. In
    other words, the procedure is called on every item in the list
    sequentially, but since each call has no return value, the call to
    procmap() also has no return value.

    @param method: The procedure to call each time.
    @param item_list: The list of items to apply the procedure to.
    @return: None
    """
    for item in item_list:
        method(item)
