This should fix the conflict

code/__HELPERS/lists.dm

@@ -31,7 +31,7 @@
 		return "[output][and_text][input[index]]"
 
 //Returns list element or null. Should prevent "index out of bounds" error.
-proc/listgetindex(var/list/list,index)
+/proc/listgetindex(var/list/list,index)
 	if(istype(list) && list.len)
 		if(isnum(index))
 			if(InRange(index,1,list.len))
@@ -40,19 +40,19 @@ proc/listgetindex(var/list/list,index)
 			return list[index]
 	return
 
-proc/islist(list/list)
+/proc/islist(list/list)
 	if(istype(list))
 		return 1
 	return 0
 
 //Return either pick(list) or null if list is not of type /list or is empty
-proc/safepick(list/list)
+/proc/safepick(list/list)
 	if(!islist(list) || !list.len)
 		return
 	return pick(list)
 
 //Checks if the list is empty
-proc/isemptylist(list/list)
+/proc/isemptylist(list/list)
 	if(!list.len)
 		return 1
 	return 0
@@ -65,13 +65,13 @@ proc/isemptylist(list/list)
 	return 0
 
 //Empties the list by setting the length to 0. Hopefully the elements get garbage collected
-proc/clearlist(list/list)
+/proc/clearlist(list/list)
 	if(istype(list))
 		list.len = 0
 	return
 
 //Removes any null entries from the list
-proc/listclearnulls(list/list)
+/proc/listclearnulls(list/list)
 	if(istype(list))
 		while(null in list)
 			list -= null
@@ -504,7 +504,7 @@ proc/dd_sortedObjectList(list/incoming)
 	return sorted_list
 */
 
-proc/dd_sortedtextlist(list/incoming, case_sensitive = 0)
+/proc/dd_sortedtextlist(list/incoming, case_sensitive = 0)
 	// Returns a new list with the text values sorted.
 	// Use binary search to order by sortValue.
 	// This works by going to the half-point of the list, seeing if the node in question is higher or lower cost,
@@ -563,12 +563,16 @@ proc/dd_sortedtextlist(list/incoming, case_sensitive = 0)
 	return sorted_text
 
 
-proc/dd_sortedTextList(list/incoming)
+/proc/dd_sortedTextList(list/incoming)
 	var/case_sensitive = 1
 	return dd_sortedtextlist(incoming, case_sensitive)
 
+/proc/subtypesof(var/path) //Returns a list containing all subtypes of the given path, but not the given path itself.
+	if(!path || !ispath(path))
+		CRASH("Invalid path, failed to fetch subtypes of \"[path]\".")
+	return (typesof(path) - path)
 
-datum/proc/dd_SortValue()
+/datum/proc/dd_SortValue()
 	return "[src]"
 
 /obj/machinery/dd_SortValue()
@@ -576,6 +580,7 @@ datum/proc/dd_SortValue()
 
 /obj/machinery/camera/dd_SortValue()
 	return "[c_tag]"
-	
+
 /datum/alarm/dd_SortValue()
-	return "[sanitize(last_name)]"
+	return "[sanitize(last_name)]"
+