An electro-optical device is provided which includes an electro-optical panel; and a metal frame configured to accommodate the electro-optical panel therein. Non-denotable anonymous types are types that a compiler generates on behalf of a programmer and can then be used as nominal types. The valve may include elements for biasing the cuff outwardly with respect to the stent body when the stent body is in an expanded condition. The virtual routing engine performs a first type of metering of the first level metering options on the packets associated with the first packet flow using a first metering control block and performs a second type of metering of the second level metering options on the packets associated with the first packet flow and the packets associated with the second flow using a second MCB.