public function groupPosts($gid, $options = '') {
		if(!is_string($gid)){
			throw new LinkedInException('LinkedIn->groupPosts(): bad data passed, $gid must be of type string');
		}
		if(!is_string($options)){
			throw new LinkedInException('LinkedIn->groupPosts(): bad data passed, $options must be of type string');
		}
		
		// construct and send the request
		$query    = self::_URL_API . '/v1/groups/' . trim($gid)  .'/posts' . trim($options);
		$response = $this->fetch('GET', $query);
		
		/**
	   * Check for successful request (a 200 response from LinkedIn server) 
	   * per the documentation linked in method comments above.
	   */
		return $this->checkResponse(200, $response);
	}