code: func getCCCall(invocChain []*fab.ChaincodeCall, ccID string) (*fab.ChaincodeCall, bool) {
  	for _, ccCall := range invocChain {
  		if ccCall.ID == ccID {
  			return ccCall, true
  		}
  	}
  	return nil, false
  }
docs: // getCC returns the ChaincodeCall from the invocation chain that matches the chaincode ID or
  // returns nil if the ChaincodeCall is not found.