code: @Override
      public AssociateRoleToGroupResult associateRoleToGroup(AssociateRoleToGroupRequest request) {
          request = beforeClientExecution(request);
          return executeAssociateRoleToGroup(request);
      }
docs: Associates a role with a group. Your Greengrass core will use the role to access AWS cloud services. The role's
  permissions should allow Greengrass core Lambda functions to perform actions against the cloud.
  
  @param associateRoleToGroupRequest
  @return Result of the AssociateRoleToGroup operation returned by the service.
  @throws BadRequestException
  invalid request
  @throws InternalServerErrorException
  server error
  @sample AWSGreengrass.AssociateRoleToGroup
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/greengrass-2017-06-07/AssociateRoleToGroup"
  target="_top">AWS API Documentation</a>