'Return information about indexes in `table_name`.
Given a :class:`.Connection`, a string
`table_name` and an optional string `schema`, return index
information as a list of dictionaries with these keys:
name
the index\'s name
column_names
list of column names in order
unique
boolean'

def get_indexes(self, connection, table_name, schema=None, **kw):

    raise NotImplementedError()
