public UpdateNodeRequest withMemberId(String memberId) {
        setMemberId(memberId);
        return this;
    }
<p>
The unique identifier of the member that owns the node.
</p>
<p>
Applies only to Hyperledger Fabric.
</p>

@param memberId
       The unique identifier of the member that owns the node.</p>
       <p>
       Applies only to Hyperledger Fabric.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-managedblockchain/src/main/java/com/amazonaws/services/managedblockchain/model/UpdateNodeRequest.java