code: public ListUserPoolsResult withUserPools(UserPoolDescriptionType... userPools) {
          if (this.userPools == null) {
              setUserPools(new java.util.ArrayList<UserPoolDescriptionType>(userPools.length));
          }
          for (UserPoolDescriptionType ele : userPools) {
              this.userPools.add(ele);
          }
          return this;
      }
docs: <p>
  The user pools from the response to list users.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setUserPools(java.util.Collection)} or {@link #withUserPools(java.util.Collection)} if you want to
  override the existing values.
  </p>
  
  @param userPools
  The user pools from the response to list users.
  @return Returns a reference to this object so that method calls can be chained together.