def support_index_min(self, tags=None):<EOL>
if tags is None:  <EOL><INDENT>tags = pep425tags.get_supported()<EOL><DEDENT>indexes = [tags.index(c) for c in self.file_tags if c in tags]<EOL>return min(indexes) if indexes else None<EOL>
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.