Here’s the plugin handbook: https://developer.www.ads-software.com/plugins/
Here’s the filter reference: https://codex.www.ads-software.com/Plugin_API/Filter_Reference
Action reference: https://codex.www.ads-software.com/Plugin_API/Action_Reference
and the code reference: https://developer.www.ads-software.com/reference/
Just to make that clear, I am talking about a TinyMCE plugin, not a WordPress plugin. It is in the folder wp-includes/js/tinymce/plugins (I put it there)
]]>