backport: Permissions#toArray

src/util/Permissions.js

@@ -155,6 +155,15 @@ class Permissions {
     return this.missing(permissions, !explicit);
   }
 
+  /**
+   * Gets an {@link Array} of permission names (such as `VIEW_CHANNEL`) based on the permissions available.
+   * @param {boolean} [checkAdmin=true] Whether to allow the administrator permission to override
+   * @returns {string[]}
+   */
+  toArray(checkAdmin = true) {
+    return Object.keys(this.constructor.FLAGS).filter(perm => this.has(perm, checkAdmin));
+  }
+
   /**
    * Freezes these permissions, making them immutable.
    * @returns {Permissions} These permissions