code: public List<Role> getRoles(HashMap<String, String> queryParameters) throws OAuthSystemException, OAuthProblemException, URISyntaxException {
  		return getRoles(queryParameters, this.maxResults);
  	}
docs: Gets a list of Role resources.
  
  @param queryParameters Query parameters of the Resource
  Parameters to filter the result of the list
  
  @return List of Role
  
  @throws OAuthSystemException - if there is a IOException reading parameters of the httpURLConnection
  @throws OAuthProblemException - if there are errors validating the OneloginOAuthJSONResourceResponse and throwOAuthProblemException is enabled
  @throws URISyntaxException - if there is an error when generating the target URL at the URIBuilder constructor
  
  @see com.onelogin.sdk.model.Role
  @see <a target="_blank" href="https://developers.onelogin.com/api-docs/1/roles/get-roles">Get Roles documentation</a>