code: SPFTrigger getTrigger(long triggerId, String appPackageName) {
  		String where = Contract._ID + " = ? AND " + Contract.COLUMN_APP_IDENTIFIER + " = ?";
  		String[] whereArgs = { Long.toString(triggerId), appPackageName };
  		Cursor c = getReadableDatabase().query(Contract.TABLE_NAME, null, where, whereArgs, null, null, null);
  		if (!c.moveToFirst()) {
  			return null;
  		}
  		SPFTrigger t = triggerFromCursor(c);
  		c.close();
  		return t;
  	}
docs: Return the trigger with the specified id.
  
  @param triggerId
  @param appPackageName
  @return