Specifies that a parameter's value should be determined by having the user select a subset from a list of pre-canned options interactively at deploy time. Will result in errors if used on parameters of type other than `string[]`.

**Signature:**

    export interface MultiSelectInput 

## Properties

| Property | Type | Description |
|---|---|---|
| [multiSelect](https://firebase.google.com/docs/reference/functions/firebase-functions.params.multiselectinput#paramsmultiselectinputmultiselect) | { options: Array\<[SelectOptions](https://firebase.google.com/docs/reference/functions/firebase-functions.params.selectoptions#paramsselectoptions_interface)\<string\>\>; nonEmpty?: boolean; } |   |

## params.MultiSelectInput.multiSelect

**Signature:**

    multiSelect: {
            options: Array<SelectOptions<string>>;
            nonEmpty?: boolean;
        };