public TrunkInterfaceAssociation withInterfaceProtocol(String interfaceProtocol) {
        setInterfaceProtocol(interfaceProtocol);
        return this;
    }
<p>
The interface protocol. Valid values are <code>VLAN</code> and <code>GRE</code>.
</p>

@param interfaceProtocol
       The interface protocol. Valid values are <code>VLAN</code> and <code>GRE</code>.
@return Returns a reference to this object so that method calls can be chained together.
@see InterfaceProtocolType
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/TrunkInterfaceAssociation.java