1 files changed, 3 insertions, 1 deletions
diff --git a/src/Utils.ts b/src/Utils.ts
index 6eacd8296..e11f1154e 100644
--- a/src/Utils.ts
+++ b/src/Utils.ts
@@ -125,7 +125,9 @@ export namespace Utils {
         // bcz: isTransparent(__value__) is a hack.  it would be nice to have acual functions be parsed, but now Doc.matchFieldValue is hardwired to recognize just this one
         return `backgroundColor:${isTransparentFunctionHack},${noRecursionHack}:x`;// bcz: hack.  noRecursion should probably be either another ':' delimited field, or it should be a modifier to the comparision (eg., check, x, etc) field
     }
-
+    export function PropUnsetFilter(prop: string) {
+        return `${prop}:any,${noRecursionHack}:unset`;
+    }
 
     export function toRGBAstr(col: { r: number, g: number, b: number, a?: number }) {
         return "rgba(" + col.r + "," + col.g + "," + col.b + (col.a !== undefined ? "," + col.a : "") + ")";