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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 get_verbose_field_name(instance, field_name):
 """ Returns verbose_name for a field. """

    fields = [field.name for field in instance._meta.fields]
    if field_name in fields:
        return instance._meta.get_field(field_name).verbose_name
    else:
        return field_name