code: public String getResumptionToken()
      {
          String resumptionToken = null;
      
          try
          {
              if (data != null && data.has(resumptionTokenParam))
              {
                  resumptionToken = data.getString(resumptionTokenParam);
              }
          }
          catch (JSONException e)
          {
              //This is already handled by the enclosing "has" checks
          }
          
          return resumptionToken;
      }
docs: Returns the resumption token, if it exists
  
  @return resumption token or null