Detemine name of replication schema

["Melvin Davidson" <mdavidson(at)cctus(dot)com>]

Title: Detemine name of replication schema

I tried searching the archive for a similar question, but found none.

I am interested in knowing what query can be used to determine the name of the replication schema(s) installed.

Pgadmin is "aware" of the replication schema(s), as they are listed for each database
    eg:  <dbname>
                      Casts
                      Languages
                      Schemas
                      Replication

 So I am curious as to what function or sql query is used to obtain that information?

IOW, I am looking for a generic way to get the names of all replication schemas in a cluster.

Thank you in advance,

Melvin Davidson