code: public BatchDisassociateUserStackRequest withUserStackAssociations(UserStackAssociation... userStackAssociations) {
          if (this.userStackAssociations == null) {
              setUserStackAssociations(new java.util.ArrayList<UserStackAssociation>(userStackAssociations.length));
          }
          for (UserStackAssociation ele : userStackAssociations) {
              this.userStackAssociations.add(ele);
          }
          return this;
      }
docs: <p>
  The list of UserStackAssociation objects.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setUserStackAssociations(java.util.Collection)} or
  {@link #withUserStackAssociations(java.util.Collection)} if you want to override the existing values.
  </p>
  
  @param userStackAssociations
  The list of UserStackAssociation objects.
  @return Returns a reference to this object so that method calls can be chained together.