Added method that exposes connection state; whether it is closed or not.

connection.go

@@ -88,3 +88,8 @@ func (conn *Conn) Close() error {
 	conn.closeConnectionToManagerCh <- struct{}{}
 	return conn.connectionManager.Close()
 }
+
+// IsClosed returns whether the connection is closed or not
+func (conn *Conn) IsClosed() bool {
+	return conn.connectionManager.IsClosed()
+}

internal/connectionmanager/connection_manager.go

@@ -171,3 +171,11 @@ func (connManager *ConnectionManager) reconnect() error {
 	connManager.connection = conn
 	return nil
 }
+
+// IsClosed checks if the connection is closed
+func (connManager *ConnectionManager) IsClosed() bool {
+	connManager.connectionMu.Lock()
+	defer connManager.connectionMu.Unlock()
+
+	return connManager.connection.IsClosed()
+}