public void setGroupId(String groupId) {
        this.groupId = groupId;
    }
<p>
The identifier for the group to be described.
</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>

@param groupId
       The identifier for the group to be described.</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/DescribeGroupRequest.java