WARNING

• this release is the first release of FastAdapter migrated to kotlin.

Changes

• this release contains a big amount of changes, including many breaking API changes to make its implementation easier, and make the APIs better compatible with kotlin.
  • Please see the migration notes: https://github.com/mikepenz/FastAdapter/blob/feature/v4/MIGRATION.md#v4xy

Changes on top of rc01

• improve extension to get select and expandable extension
• fix crash when collapsing items which are not IExpandable but only ISubItem