getConnection method
Gets a connection by its ID.
Returns null if the connection doesn't exist.
Example:
final connection = controller.getConnection('conn1');
if (connection != null) {
print('Source: ${connection.sourceNodeId}');
}
Implementation
Connection<C>? getConnection(String connectionId) {
return _connections
.where((c) => c.id == connectionId)
.firstOrNull;
}