/**
* Gets the index associated with `key` in the backing array, if it is already present.
*/
export declare let get: (strarr: SetArray, key: string) => number | undefined;
/**
* Puts `key` into the backing array, if it is not already present. Returns
* the index of the `key` in the backing array.
*/
export declare let put: (strarr: SetArray, key: string) => number;
/**
* Pops the last added item out of the SetArray.
*/
export declare let pop: (strarr: SetArray) => void;
/**
* SetArray acts like a `Set` (allowing only one occurrence of a string `key`), but provides the
* index of the `key` in the backing array.
*
* This is designed to allow synchronizing a second array with the contents of the backing array,
* like how in a sourcemap `sourcesContent[i]` is the source content associated with `source[i]`,
* and there are never duplicates.
*/
export declare class SetArray {
private _indexes;
array: readonly string[];
constructor();
}
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