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Solve the following python programming problem given the following code:
@ not_implemented_for ('undirected') 
def strongly_connected_components_recursive(G) : 
    "Generate nodes in strongly connected components of graph.

    Recursive version of algorithm.

    Parameters
    ----------
    G : NetworkX Graph
        An directed graph.

    Returns
    -------
    comp : generator of sets
        A generator of sets of nodes, one for each strongly connected
        component of G.

    Raises
    ------
    NetworkXNotImplemented :
        If G is undirected.

    Examples
    --------
    Generate a sorted list of strongly connected components, largest first.

    >>> G = nx.cycle_graph(4, create_using=nx.DiGraph())
    >>> nx.add_cycle(G, [10, 11, 12])
    >>> [len(c) for c in sorted(nx.strongly_connected_components_recursive(G),
    ...                         key=len, reverse=True)]
    [4, 3]

    If you only want the largest component, it's more efficient to
    use max instead of sort.

    >>> largest = max(nx.strongly_connected_components_recursive(G), key=len)

    See Also
    --------
    connected_components

    Notes
    -----
    Uses Tarjan's algorithm[1]_ with Nuutila's modifications[2]_.

    References
    ----------
    .. [1] Depth-first search and linear graph algorithms, R. Tarjan
       SIAM Journal of Computing 1(2):146-160, (1972).

    .. [2] On finding the strongly connected components in a directed graph.
       E. Nuutila and E. Soisalon-Soinen
       Information Processing Letters 49(1): 9-14, (1994)..

    " 
    def visit(v, cnt) : 
        root [v] = cnt 
        visited [v] = cnt 
        cnt += 1 
        stack.append (v) 
        for w in G [v] : 
            if (w not in visited) : 
                for c in visit (w, cnt) : 
                    (yield c) 
if (w not in component) : 
                root [v] = min (root [v], root [w]) 
if (root [v] == visited [v]) : 
            component [v] = root [v] 
            tmpc = { v } 
            while (stack [(- 1)] != v) : 
                w = stack.pop () 
                component [w] =...

    
    

    Fix the buggy line: for c in visit (component, cnt) :
assistant
#Here is Python program to fix the buggy line: for c in visit (component, cnt) :
.

for c in visit (source, cnt) :