code: @Override
      public UpdateAssumeRolePolicyResult updateAssumeRolePolicy(UpdateAssumeRolePolicyRequest request) {
          request = beforeClientExecution(request);
          return executeUpdateAssumeRolePolicy(request);
      }
docs: <p>
  Updates the policy that grants an IAM entity permission to assume a role. This is typically referred to as the
  "role trust policy". For more information about roles, go to <a
  href="https://docs.aws.amazon.com/IAM/latest/UserGuide/roles-toplevel.html">Using Roles to Delegate Permissions
  and Federate Identities</a>.
  </p>
  
  @param updateAssumeRolePolicyRequest
  @return Result of the UpdateAssumeRolePolicy operation returned by the service.
  @throws NoSuchEntityException
  The request was rejected because it referenced a resource entity that does not exist. The error message
  describes the resource.
  @throws MalformedPolicyDocumentException
  The request was rejected because the policy document was malformed. The error message describes the
  specific error.
  @throws LimitExceededException
  The request was rejected because it attempted to create resources beyond the current AWS account limits.
  The error message describes the limit exceeded.
  @throws UnmodifiableEntityException
  The request was rejected because only the service that depends on the service-linked role can modify or
  delete the role on your behalf. The error message includes the name of the service that depends on this
  service-linked role. You must request the change through that service.
  @throws ServiceFailureException
  The request processing has failed because of an unknown error, exception or failure.
  @sample AmazonIdentityManagement.UpdateAssumeRolePolicy
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/iam-2010-05-08/UpdateAssumeRolePolicy" target="_top">AWS API
  Documentation</a>