code: public ItemRef item(ItemAttribute primaryKeyValue, ItemAttribute secondaryKeyValue){
  		return new ItemRef(context, this, primaryKeyValue, secondaryKeyValue);
  	}
docs: Creates a new item reference.
  
  <pre>
  StorageRef storage = new StorageRef("your_app_key", "your_token");
  
  TableRef tableRef = storage.table("your_table");
  
  ItemRef itemRef = tableRef.item(new ItemAttribute("your_primary_key_value"),new ItemAttribute("your_secondary_key_value"));
  
  </pre>
  
  @param primaryKeyValue
  The primary key. Must match the table schema.
  @param secondaryKeyValue
  The secondary key. Must match the table schema.
  @return Current table reference