| A | ↘ | B | IMAPMessage got worse |
| ⇢ | A | IMAPMailbox::message() added | |
| ⇢ | A | IMAPMessage::header() added | |
| ⇢ | A | IMAPMessage::msgNumber() added | |
| ⇢ | A | IMAPMessage::mailbox() added | |
| ⇢ | A | IMAPMessagePart::message() added | |
| ⇢ | A | IMAPMessagePart::section() added | |
| ⇢ | A | IMAPMessagePart::subtype() added |