public void setMembershipExists(Boolean membershipExists) {
        this.membershipExists = membershipExists;
    }
<p>
Indicates whether a membership relation exists or not.
</p>

@param membershipExists
       Indicates whether a membership relation exists or not.
aws-java-sdk-identitystore/src/main/java/com/amazonaws/services/identitystore/model/GroupMembershipExistenceResult.java