question: vraci klienta podle uzivatelskeho jmena concode_field_sep File file concode_elem_sep Document d concode_elem_sep Node root concode_elem_sep XMLClientsIO instance concode_elem_sep ArrayList<ClientNode> clients concode_field_sep boolean usernameExists concode_elem_sep void removeContact concode_elem_sep void readFromFile concode_elem_sep void addClient concode_elem_sep void refreshClients concode_elem_sep ClientNode findUserPassword concode_elem_sep XMLClientsIO getInstance concode_elem_sep void addContact concode_elem_sep ArrayList<ClientNode> findContact concode_elem_sep void write
target: ClientNode function ( String arg0 ) { int loc0 = 0 ; ClientNode loc1 = null ; while ( loc0 < clients . size ( ) ) { loc1 = clients . get ( loc0 ) ; if ( loc1 . getUsername ( ) . equals ( arg0 ) ) { break ; } loc0 ++ ; } return loc1 ; }