/**
 * Strips dangerous prototype pollution keys (__proto__, prototype, constructor)
 * from an object recursively.
 *
 * The traversal keeps its own stack instead of calling itself, so a value
 * nested deeper than the call stack does not throw a `RangeError`, and it
 * skips the objects it has already visited, so a value with a cycle (e.g. an
 * entity with a two-way relation) is walked once instead of forever.
 */
export declare function stripProtoKeys(value: any): void;