'Return information about unique constraints in `table_name`.
Given a string `table_name` and an optional string `schema`, return
unique constraint information as a list of dicts with these keys:
name
the unique constraint\'s name
column_names
list of column names in order
\**kw
other options passed to the dialect\'s get_unique_constraints() method.
.. versionadded:: 0.9.0'

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

    raise NotImplementedError()
