code: private DeleteSecurityGroupResponseType deleteSecurityGroup(final String securityGroupId) {
          DeleteSecurityGroupResponseType ret = new DeleteSecurityGroupResponseType();
          ret.setRequestId(UUID.randomUUID().toString());
          mockSecurityGroupController.deleteSecurityGroup(securityGroupId);
          return ret;
      }
docs: Handles "deleteSecurityGroup" request to delete SecurityGroup and returns response with a SecurityGroup.
  @param securityGroupId SecurityGroup Id.
  @return a DeleteSecurityGroupResponseType with SecurityGroup.