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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 is_bootstrapped(metadata):
 """Return True if cihai is correctly bootstrapped."""

    fields = UNIHAN_FIELDS + DEFAULT_COLUMNS
    if TABLE_NAME in metadata.tables.keys():
        table = metadata.tables[TABLE_NAME]

        if set(fields) == set(c.name for c in table.columns):
            return True
        else:
            return False
    else:
        return False