Input ports are data ports owned by data consumers. They receive data from a DtPortConnection, and make that data available to the user of the input port. Users of the port should call newData() to check if new data has arrived on this port, and then call dataReceived() to signal that they have received and processed the data currently on the port.
Returns true if this port should accept the recipt of the specified DtPortData type. Override this function to return true for the types your port will accept.
