public void setSubjectKey(String subjectKey) {
        this.subjectKey = subjectKey;
    }
<p>
Element of the SAML assertion to use for the user name. Default is <code>NameID</code>.
</p>

@param subjectKey
       Element of the SAML assertion to use for the user name. Default is <code>NameID</code>.
aws-java-sdk-opensearch/src/main/java/com/amazonaws/services/opensearch/model/SAMLOptionsInput.java