seperate overrides

Author: jaypea

types/models.d.ts

@@ -184,7 +184,8 @@ declare module 'mongoose' {
     castObject(obj: AnyObject, options?: { ignoreCastErrors?: boolean }): TRawDocType;
 
     /* Apply defaults to the given document or POJO. */
-    applyDefaults(obj: AnyObject|TRawDocType): TRawDocType;
+    applyDefaults(obj: AnyObject): AnyObject;
+    applyDefaults(obj: TRawDocType): TRawDocType;
 
     /**
      * Sends multiple `insertOne`, `updateOne`, `updateMany`, `replaceOne`,