--- /dev/null
+val log_k: bool ref
+
+val log_m: bool ref
+
+val log_o: bool ref
+
+val log_s: bool ref
+
+val log_t: bool ref
+
+val bw: bool ref
+
+val register_c: RecommTypes.step -> unit
+
+val register_s: RecommTypes.step -> unit
+
+val recomm_srcs: RecommTypes.srcs -> RecommTypes.srcs