public MemberId getMemberId() {
        return this.memberId;
    }
<p>
An object that contains the identifier of a group member. Setting the <code>UserID</code> field to the specific
identifier for a user indicates that the user is a member of the group.
</p>

@return An object that contains the identifier of a group member. Setting the <code>UserID</code> field to the
        specific identifier for a user indicates that the user is a member of the group.
aws-java-sdk-identitystore/src/main/java/com/amazonaws/services/identitystore/model/GroupMembershipExistenceResult.java