activity/object/object.php
public function setSummary($summary)
    {
        if (!is_null($summary)) {
            $summary = (string) $summary;
        }

        $this->summary = $summary;
        return $this;
    }
public function setSummary($summary)
    {
        if (!is_null($summary)) {
            $summary = (string) $summary;
        }

        $this->summary = $summary;
        return $this;
    }
public function setSummary ( $ summary ) { if ( ! is_null ( $ summary ) ) { $ summary = ( string ) $ summary ; } $ this -> summary = $ summary ; return $ this ; }
Set the summary.

@link http://activitystrea.ms/specs/json/1.0/#object See summary property.

@param mixed $summary The summary.
@return ComActivitiesActivityObject
Set the summary .