'Return the lowest index that one of the wheel\'s file_tag combinations
achieves in the supported_tags list e.g. if there are 8 supported tags,
and one of the file tags is first in the list, then return 0.  Returns
None is the wheel is not supported.'

def support_index_min(self, tags=None):

    if (tags is None):
        tags = pep425tags.supported_tags
    indexes = [tags.index(c) for c in self.file_tags if (c in tags)]
    return (min(indexes) if indexes else None)
