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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_consistent_subset(model, epsilon, solver):
 """Return consistent subset of model. The largest consistent subset is returned as a set of reaction names. Args: model: :class:`MetabolicModel` to solve. epsilon: Flux threshold value. solver: LP solver instance to use. Returns: Set of reaction IDs in the consistent reaction subset. """

    reaction_set = set(model.reactions)
    return reaction_set.difference(fastcc(model, epsilon, solver))