Validates document to ensure that only fragment spreads reference named fragments that exist.
Run the validation
flag_invalid(Blueprint.node_t) :: Blueprint.node_t
flag_invalid(Blueprint.node_t, atom) :: Blueprint.node_t
put_error(Blueprint.node_t, Absinthe.Phase.Error.t) :: Blueprint.node_t
run(Absinthe.Blueprint.t, Keyword.t) :: Absinthe.Phase.result_t
Run the validation.