var connected = {};     // dictionaries of connections and disconnections between frames and schemas 
 var connected_reverse = {};

function memorizeConnections(arguments_connected, frames_connection){
    connected = arguments_connected;
    connected_reverse = frames_connection;
}

function getConnected(frame_id) { /* TODO */
    return []
}

function removeFrameConnections(frame_id) { /* TODO */
    return
}