code: public void setFields(java.util.Collection<Field> fields) {
          if (fields == null) {
              this.fields = null;
              return;
          }
  
          this.fields = new com.amazonaws.internal.SdkInternalList<Field>(fields);
      }
docs: <p>
  Key-value pairs that define the properties of the ReportTaskProgressInput object.
  </p>
  
  @param fields
  Key-value pairs that define the properties of the ReportTaskProgressInput object.