Migration from v1 to v2

[gsouf]

Hi, I'm reading the doc for the new v2 in the readme, I can't understand the new configuration.

It is mentioned

Each config includes: 
    "styles", "field" and "editorConfig" properties.
    Property "field" is required.

What are each of these properties for? Are they specific to ckeditor, or to strapi, or is it custom config of the plugin?

For example in the given config file I see a field configs.toolbar.editorConfig and also a field custom.editorConfig.toolbar. I'm not sure what is used where?

Thanks