public GroupMembershipExistenceResult withMemberId(MemberId memberId) {
        setMemberId(memberId);
        return this;
    }
<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>

@param memberId
       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.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-identitystore/src/main/java/com/amazonaws/services/identitystore/model/GroupMembershipExistenceResult.java