,--------------------------------.                      
,------------------------.  |VideoCallService                |                      
|AppComponent            |  |--------------------------------|                      
|------------------------|  |-sender_id:string;              |                      
|                        |  |-receiver_id:string;            |   ,-----------------.
|	-project_name: string; |  |-local_video:MediaStream;       |   |RepositoryService|
|	-title: string;        |  |-remote_video:MediaStream;      |   |-----------------|
|                        |  |+set sender();                  |   `-----------------'
|	+get page_title():string; |+set receiver();                |                      
|	+set page_title();     |  |+get local_video():MediaStream; |                      
|                        |  |+get remote_video():MediaStream;|                      
`------------------------'  `--------------------------------'                      
                                             |                                      
                                             |                                      
                                             |                                      
                                   ,------------------.                             
                                   |VideoCallComponent|                             
                                   |------------------|                             
                                   |                  |                             
                                   `------------------'