code: public void setStepStates(java.util.Collection<String> stepStates) {
          if (stepStates == null) {
              this.stepStates = null;
              return;
          }
  
          this.stepStates = new com.amazonaws.internal.SdkInternalList<String>(stepStates);
      }
docs: <p>
  The filter to limit the step list based on certain states.
  </p>
  
  @param stepStates
  The filter to limit the step list based on certain states.
  @see StepState