Magnolia 5.6 reached end of life on June 25, 2020. This branch is no longer supported, see End-of-life policy.
changes.mady.by.user Martin Drápela
Saved on 2019-05-16
...
Note that RichTextFieldDefinition, based on the CKEditor, is supported in the Content editor since the Magnolia 5.6.11 release.
RichTextFieldDefinition
All the other predefined block types implement the FieldSetBlockDefinition class.
FieldSetBlockDefinition