'Return information about foreign_keys in `table_name`.
Given a :class:`.Connection`, a string
`table_name`, and an optional string `schema`, return foreign
key information as a list of dicts with these keys:
name
the constraint\'s name
constrained_columns
a list of column names that make up the foreign key
referred_schema
the name of the referred schema
referred_table
the name of the referred table
referred_columns
a list of column names in the referred table that correspond to
constrained_columns'

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

    raise NotImplementedError()
