Remove all (key,value) pairs from the given message.
@param[in,out] message message to operate on.
@paramin key key to delete properties for. If NULL, delete
* properties for all keys
@returns
- NOTMUCH_STATUS_READ_ONLY_DATABASE: Database was opened in
read-only mode so message cannot be modified.
- NOTMUCH_STATUS_SUCCESS: No error occured.
Remove all (key,value) pairs from the given message.
@param[in,out] message message to operate on. @paramin key key to delete properties for. If NULL, delete * properties for all keys @returns - NOTMUCH_STATUS_READ_ONLY_DATABASE: Database was opened in read-only mode so message cannot be modified. - NOTMUCH_STATUS_SUCCESS: No error occured.
@since libnotmuch 4.4 (notmuch 0.23)