public String getGroupId() {
        return this.groupId;
    }
<p>
The identifier for the group to be updated.
</p>
<p>
The identifier can accept <i>GroupId</i>, <i>Groupname</i>, or <i>email</i>. The following identity formats are
available:
</p>
<ul>
<li>
<p>
Group ID: 12345678-1234-1234-1234-123456789012 or S-1-1-12-1234567890-123456789-123456789-1234
</p>
</li>
<li>
<p>
Email address: group@domain.tld
</p>
</li>
<li>
<p>
Group name: group
</p>
</li>
</ul>

@return The identifier for the group to be updated.</p>
        <p>
        The identifier can accept <i>GroupId</i>, <i>Groupname</i>, or <i>email</i>. The following identity
        formats are available:
        </p>
        <ul>
        <li>
        <p>
        Group ID: 12345678-1234-1234-1234-123456789012 or S-1-1-12-1234567890-123456789-123456789-1234
        </p>
        </li>
        <li>
        <p>
        Email address: group@domain.tld
        </p>
        </li>
        <li>
        <p>
        Group name: group
        </p>
        </li>
aws-java-sdk-workmail/src/main/java/com/amazonaws/services/workmail/model/UpdateGroupRequest.java