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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def fastcc_is_consistent(model, epsilon, solver):
 """Quickly check whether model is consistent Return true if the model is consistent. If it is only necessary to know whether a model is consistent, this function is fast as it will return the result as soon as it finds a single inconsistent reaction. Args: model: :class:`MetabolicModel` to solve. epsilon: Flux threshold value. solver: LP solver instance to use. """

    for reaction in fastcc(model, epsilon, solver):
        return False
    return True