Add warnings for Collection.find/exists

src/client/Client.js

@@ -340,7 +340,7 @@ class Client extends EventEmitter {
    * Sets a timeout that will be automatically cancelled if the client is destroyed.
    * @param {function} fn Function to execute
    * @param {number} delay Time to wait before executing (in milliseconds)
-   * @param {args} args Arguments for the function (not an array, but an infinite argument)
+   * @param {args} args Arguments for the function (infinite/rest argument, not an array)
    * @returns {Timeout}
    */
   setTimeout(fn, delay, ...args) {
@@ -365,7 +365,7 @@ class Client extends EventEmitter {
    * Sets an interval that will be automatically cancelled if the client is destroyed.
    * @param {function} fn Function to execute
    * @param {number} delay Time to wait before executing (in milliseconds)
-   * @param {args} args Arguments for the function (not an array, but an infinite argument)
+   * @param {args} args Arguments for the function (infinite/rest argument, not an array)
    * @returns {Timeout}
    */
   setInterval(fn, delay, ...args) {