add more control for other plugins

Author: patricklx

src/scope-locals.ts

@@ -14,6 +14,10 @@ export class ScopeLocals {
     return this.#locals;
   }
 
+  get mapping() {
+    return this.#mapping;
+  }
+
   has(key: string): boolean {
     return key in this.#mapping;
   }
@@ -40,4 +44,12 @@ export class ScopeLocals {
       this.#locals.push(key);
     }
   }
+
+  remove(key: string) {
+    delete this.#mapping[key];
+    const i = this.#locals.indexOf(key);
+    if (i >= 0) {
+      this.#locals.splice(i, 1);
+    }
+  }
 }