I propose that in `Promises`, we accept another function which returns a `boolean` as an argument to `catch`. It will enable us to write code like this:
```js return somePromise .catch((reason) => reason instanceof ValidationError, reason => handleValidationError(reason)) // handle ValidationErrors .catch((reason) => reason instanceof InternalError, reason => handleInternalError(reason)) // handle InternalErrors .catch(reason => handleOtherErrors(reason)) // catch all others ``` If the passed function evaluates to `true`, call the actual rejection handler. If none of the catch are eligible to handle the rejection, it causes an unhandled rejection.
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