contract ERC223ReceivingContract { 

  /**
    * @dev Standard ERC223 function that will handle incoming token transfers.
    *
    * @param _from  Token sender address.
    * @param _value Amount of tokens.
    * @param _data  Transaction metadata.
  */
  function tokenFallback(address _from, uint _value, bytes _data);

}
/**
 * @title Contract that will work with ERC223 tokens.
 **/
function tokenFallback(address _from, uint _value, bytes _data);

/**
 * @dev Standard ERC223 function that will handle incoming token transfers.
 *
 * @param _from  Token sender address.
 * @param _value Amount of tokens.
 * @param _data  Transaction metadata.
 */