Dialogue of the Mannequin and the Young Man

I read in a book on the Living Theatre that there was a performance of a play with this name by Lorca in 1951 in someone's apartment. Of course, my immediate reaction is that there is no such play. Apocryphal Lorca again! I'm guessing this is a fragment from Así que pasen cinco años.

For context, the same night saw performances of plays by Paul Goodman, Gertrude Stein, and Brecht. (Biner, The Living Theatre, 26).