Message sent objectGoogle_Service_Gmail_Message Object ( [collection_key:protected] => labelIds [historyId] => [id] => 16381823be0550bb [internalDate] => [labelIds] => Array ( [0] => SENT ) [payloadType:protected] => Google_Service_Gmail_MessagePart [payloadDataType:protected] => [raw] => [sizeEstimate] => [snippet] => [threadId] => 16381823be0550bb [internal_gapi_mappings:protected] => Array ( ) [modelData:protected] => Array ( ) [processed:protected] => Array ( ) )