| /** |
| * @license |
| * Copyright Google LLC All Rights Reserved. |
| * |
| * Use of this source code is governed by an MIT-style license that can be |
| * found in the LICENSE file at https://angular.io/license |
| */ |
| /** |
| * Coerces a value to an array of trimmed non-empty strings. |
| * Any input that is not an array, `null` or `undefined` will be turned into a string |
| * via `toString()` and subsequently split with the given separator. |
| * `null` and `undefined` will result in an empty array. |
| * This results in the following outcomes: |
| * - `null` -> `[]` |
| * - `[null]` -> `["null"]` |
| * - `["a", "b ", " "]` -> `["a", "b"]` |
| * - `[1, [2, 3]]` -> `["1", "2,3"]` |
| * - `[{ a: 0 }]` -> `["[object Object]"]` |
| * - `{ a: 0 }` -> `["[object", "Object]"]` |
| * |
| * Useful for defining CSS classes or table columns. |
| * @param value the value to coerce into an array of strings |
| * @param separator split-separator if value isn't an array |
| */ |
| export declare function coerceStringArray(value: any, separator?: string | RegExp): string[]; |
