A [widget] is [describe in very simple terms].
In memory, a [widget] looks like this:
[sketch or diagram]
[description of diagram]
A [widget] supports the following operations:
- name: description, Big O efficiency, and explain why / what that means
- name: description, Big O efficiency, and explain why / what that means
An [widget] is useful [when] [why].
It is not as good as [what] [why].
sample code showing creation, and exercising all of the operations
or
a program that doesn't use the structure, and then a version that does
(c) 2018 YOUR NAME. All rights reserved.