code: public DescribeSessionsResult withSessions(Session... sessions) {
          if (this.sessions == null) {
              setSessions(new com.amazonaws.internal.SdkInternalList<Session>(sessions.length));
          }
          for (Session ele : sessions) {
              this.sessions.add(ele);
          }
          return this;
      }
docs: <p>
  A list of sessions meeting the request parameters.
  </p>
  <p>
  <b>NOTE:</b> This method appends the values to the existing list (if any). Use
  {@link #setSessions(java.util.Collection)} or {@link #withSessions(java.util.Collection)} if you want to override
  the existing values.
  </p>
  
  @param sessions
  A list of sessions meeting the request parameters.
  @return Returns a reference to this object so that method calls can be chained together.