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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 op_decanonicalize(op_name, canonical_op):
 """ Get the current representation of a parsed operation's data, given the canonical representation Meant for backwards-compatibility """

    global DECANONICALIZE_METHODS

    if op_name not in DECANONICALIZE_METHODS:
        # no decanonicalization needed
        return canonical_op
    else:
        return DECANONICALIZE_METHODS[op_name](canonical_op)