public void setIamUserArns(java.util.Collection<String> iamUserArns) {
        if (iamUserArns == null) {
            this.iamUserArns = null;
            return;
        }

        this.iamUserArns = new com.amazonaws.internal.SdkInternalList<String>(iamUserArns);
    }
<p>
An array of IAM or federated user ARNs that identify the users to be described.
</p>

@param iamUserArns
       An array of IAM or federated user ARNs that identify the users to be described.
aws-java-sdk-opsworks/src/main/java/com/amazonaws/services/opsworks/model/DescribeUserProfilesRequest.java