diff --git a/src/core/extension.ts b/src/core/extension.ts
index 166b1193..2f4d892e 100644
--- a/src/core/extension.ts
+++ b/src/core/extension.ts
@@ -142,11 +142,10 @@ export default class ExtensionCore extends EventEmitter<Events> implements Dispo
         return workspace.getWorkspaceFolder(Uri.file(filePath))?.uri;
     }
 
-    if (!options.silent) {
-      if (options.token && options.token.isCancellationRequested) return;
-      const picked = await window.showWorkspaceFolderPick();
-      if (picked) return picked.uri;
-    }
+    if (options.silent || options.token?.isCancellationRequested) return;
+
+    const picked = await window.showWorkspaceFolderPick();
+    if (picked) return picked.uri;
   }
 
   async activate(context: ExtensionContext = this.context) {
diff --git a/src/structures/Timeout.ts b/src/structures/Timeout.ts
index d6306ccd..47a74032 100644
--- a/src/structures/Timeout.ts
+++ b/src/structures/Timeout.ts
@@ -1,44 +1,51 @@
-const MAX_TIMER_DELAY = 2147483647;
+const _maxTimerDelay = 2147483647;
 
-export default class Timeout {
-  constructor(callback: () => unknown, delay: number = 0) {
+export default class Timeout implements NodeJS.Timeout {
+  constructor(callback: () => unknown, delay: number = 1) {
     this.#callback = callback;
     this.#remain = this.#delay = delay;
     this.#start();
   }
 
+  _onTimeout(...args: any[]): void {
+    this.#timeout._onTimeout(...args);
+  }
+
   #callback: () => unknown;
-  #called: boolean = false;
+  #called!: boolean;
   #delay: number;
   #remain!: number;
   #timeout!: NodeJS.Timeout;
 
   #start() {
     this.#called = false;
-    if (this.#remain > MAX_TIMER_DELAY) {
-      this.#timeout = setTimeout(() => {
-        this.#remain -= MAX_TIMER_DELAY;
-        if (this.#remain > MAX_TIMER_DELAY)
-          this.#timeout.refresh();
-        else this.#start();
-      }, MAX_TIMER_DELAY).unref();
+    if (this.#remain > _maxTimerDelay) {
+      this.#timeout = setTimeout(this.#autoRefreshCallback.bind(this), _maxTimerDelay).unref();
     } else {
-      this.#timeout = setTimeout(() => {
-        this.#called = true;
-        this.#callback();
-      }, this.#remain).unref();
+      this.#timeout = setTimeout(this.#lastCallback.bind(this), this.#remain).unref();
     }
   }
 
+  #autoRefreshCallback() {
+    this.#remain -= _maxTimerDelay;
+    if (this.#remain > _maxTimerDelay) return this.#timeout.refresh();
+    this.#start();
+  }
+
+  #lastCallback() {
+    this.#called = true;
+    this.#callback();
+  }
+
   get delay() { return this.#delay; }
   /** @readonly */
   get remain() { return this.#remain; }
 
   set delay(delay) {
-    const diff = delay - this.#delay;
-
     this.#delay = delay;
 
+    const diff = delay - this.#delay;
+
     this.#remain += diff;
 
     if (this.#called) return;
@@ -47,16 +54,16 @@ export default class Timeout {
   }
 
   /** If true, the `Timeout` object will keep the Node.js event loop active. */
-  get hasRef() {
-    return this.#timeout.hasRef();
-  }
+  hasRef() { return this.#timeout.hasRef(); }
 
   ref() {
     this.#timeout.ref();
+    return this;
   }
 
   unref() {
     this.#timeout.unref();
+    return this;
   }
 
   reset() {
@@ -64,6 +71,11 @@ export default class Timeout {
     this.restart();
   }
 
+  refresh() {
+    this.#timeout.refresh();
+    return this;
+  }
+
   restart() {
     this.close();
     this.#start();
@@ -71,9 +83,12 @@ export default class Timeout {
 
   close() {
     clearTimeout(this.#timeout);
+    return this;
   }
 
-  dispose() {
-    this.close();
-  }
+  dispose() { this.#timeout[Symbol.dispose](); }
+
+  [Symbol.toPrimitive]() { return this.#timeout[Symbol.toPrimitive](); }
+
+  [Symbol.dispose]() { this.#timeout[Symbol.dispose](); }
 }
diff --git a/src/structures/TimerMap.ts b/src/structures/TimerMap.ts
index d0aca69d..872fe926 100644
--- a/src/structures/TimerMap.ts
+++ b/src/structures/TimerMap.ts
@@ -1,6 +1,6 @@
 import type { Disposable } from "vscode";
 
-const MAX_TIMER_DELAY = 2147483647;
+const _maxTimerDelay = 2147483647;
 
 export interface TimerMapOptions {
   /**
@@ -13,9 +13,9 @@ export interface TimerMapOptions {
   autoUnref?: boolean
 }
 
-export default class TimerMap<K, V extends NodeJS.Timeout = NodeJS.Timeout> extends Map<K, V> implements Disposable {
+export default class TimerMap<K = keyof any, T extends NodeJS.Timeout = NodeJS.Timeout> extends Map<K, T> implements Disposable {
   constructor(
-    entries?: readonly (readonly [K, V])[] | Iterable<readonly [K, V]> | null,
+    entries?: readonly (readonly [K, T])[] | Iterable<readonly [K, T]> | null,
     options?: TimerMapOptions,
   ) {
     super(entries);
@@ -50,7 +50,7 @@ export default class TimerMap<K, V extends NodeJS.Timeout = NodeJS.Timeout> exte
     return this.get(key)?.refresh();
   }
 
-  set(key: K, timeout: V): this {
+  set(key: K, timeout: T): this {
     this.clearTimeout(key);
     return super.set(key, timeout);
   }
@@ -72,25 +72,28 @@ export default class TimerMap<K, V extends NodeJS.Timeout = NodeJS.Timeout> exte
   setTimeout(key: K, callback: () => void, delay: number = 1): void {
     this.clearTimeout(key);
 
-    if (delay > MAX_TIMER_DELAY) return this._autoRefresh(key, callback, delay);
+    if (delay > _maxTimerDelay) return this.#autoRefresh(key, callback, delay);
+
+    const timer = setTimeout(this.#wrapCallback(key, callback), delay);
 
-    const timer = setTimeout(this._wrapCallback(key, callback), delay);
     if (this.autoUnref) timer.unref();
-    super.set(key, timer as V);
+
+    super.set(key, timer as T);
   }
 
-  protected _autoRefresh(key: K, callback: () => void, delay: number) {
+  #autoRefresh(key: K, callback: () => void, delay: number) {
     const timer = setTimeout(() => {
-      delay -= MAX_TIMER_DELAY;
-      if (delay > MAX_TIMER_DELAY) return timer.refresh();
+      delay -= _maxTimerDelay;
+      if (delay > _maxTimerDelay) return timer.refresh();
       this.setTimeout(key, callback, delay);
-    }, MAX_TIMER_DELAY);
+    }, _maxTimerDelay);
 
     if (this.autoUnref) timer.unref();
-    super.set(key, timer as V);
+
+    super.set(key, timer as T);
   }
 
-  protected _wrapCallback(key: K, callback: () => void) {
+  #wrapCallback(key: K, callback: () => void) {
     return () => {
       super.delete(key);
       callback();