How to Introduce Software Design Patterns

1. In the wiki's sidebar, add a link to a new page under the Software Design Patterns section.
2. Click on the newly created link and describe the design pattern in the new wiki page. Explain which problem it solves and what the solution is. Include any link which might help understanding this concept.
3. Introduce this design pattern to the team. Implementing it in a PR is a good starting point to discuss about the changes and teach others.