code: public Update withParams(UpdateParam... params) {
          if (this.params == null) {
              setParams(new java.util.ArrayList<UpdateParam>(params.length));
          }
          for (UpdateParam ele : params) {
              this.params.add(ele);
          }
          return this;
      }
docs: <p>
  A key-value map that contains the parameters associated with the update.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setParams(java.util.Collection)} or {@link #withParams(java.util.Collection)} if you want to override the
  existing values.
  </p>
  
  @param params
  A key-value map that contains the parameters associated with the update.
  @return Returns a reference to this object so that method calls can be chained together.