code: @Override
      public Cluster modifyClusterIamRoles(ModifyClusterIamRolesRequest request) {
          request = beforeClientExecution(request);
          return executeModifyClusterIamRoles(request);
      }
docs: <p>
  Modifies the list of AWS Identity and Access Management (IAM) roles that can be used by the cluster to access
  other AWS services.
  </p>
  <p>
  A cluster can have up to 10 IAM roles associated at any time.
  </p>
  
  @param modifyClusterIamRolesRequest
  @return Result of the ModifyClusterIamRoles operation returned by the service.
  @throws InvalidClusterStateException
  The specified cluster is not in the <code>available</code> state.
  @throws ClusterNotFoundException
  The <code>ClusterIdentifier</code> parameter does not refer to an existing cluster.
  @sample AmazonRedshift.ModifyClusterIamRoles
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/redshift-2012-12-01/ModifyClusterIamRoles" target="_top">AWS
  API Documentation</a>