Source Reference:

• Component: BuddyPress:: bp-messages

  File: /bp-messages/bp-messages-template.php :: Trac Source Line: 154

  			$this->thread->last_message_id = $this->thread->messages[$last_message_index]->id;
  			$this->thread->last_message_date = $this->thread->messages[$last_message_index]->date_sent;
  			$this->thread->last_sender_id = $this->thread->messages[$last_message_index]->sender_id;
  			$this->thread->last_message_subject = $this->thread->messages[$last_message_index]->subject;
  			$this->thread->last_message_content = $this->thread->messages[$last_message_index]->message;
  		}
  
  		if ( 0 == $this->current_thread ) // loop has just started
  			do_action('messages_box_loop_start');
  	}
  }
  
  function bp_has_message_threads( $args = '' ) {
  	global $bp, $messages_template;
  
  	$defaults = array(
  		'user_id' => $bp->loggedin_user->id,
  		'box' => 'inbox',
  		'per_page' => 10,