code: public void setUnsuccessful(java.util.Collection<UnsuccessfulItem> unsuccessful) {
          if (unsuccessful == null) {
              this.unsuccessful = null;
              return;
          }
  
          this.unsuccessful = new com.amazonaws.internal.SdkInternalList<UnsuccessfulItem>(unsuccessful);
      }
docs: <p>
  Information about the flow logs that could not be created successfully.
  </p>
  
  @param unsuccessful
  Information about the flow logs that could not be created successfully.