framework/base/Component.php
public function getBehavior($name)
    {
        $this->ensureBehaviors();
        return isset($this->_behaviors[$name]) ? $this->_behaviors[$name] : null;
    }
public function getBehavior($name)
    {
        $this->ensureBehaviors();
        return isset($this->_behaviors[$name]) ? $this->_behaviors[$name] : null;
    }
Returns the named behavior object.
@param string $name the behavior name
@return null|Behavior the behavior object, or null if the behavior does not exist