The interface definitions are pretty simple: The marked lines show the interface that a configurator class needs to implement. It’s just a marker interface (i.e., doesn’t specify any required methods).
With WordPress 5, the default post editor is a new piece of software called Gutenberg. It’s block-based, rather than it’s-all-just-a-bunch-of-text-based, like the earlier editor. It’s got a number of nice
This site is dedicated to a furry friend whose life served as a reminder that one should always be willing to take a leap into the unknown. Because otherwise you’ll never know what you might have missed.