export declare function setTrustedSignalSet(signals: WeakSet<object>): void;
export declare function addTrustedSignal(signal: object): void;
/**
 * The legacy validation behavior was that this check should only
 * be performed for runtimes that have provided a trustedSignals set.
 * However, this resulted in a bug as all object values were
 * being considered signals in environments where the trustedSignals
 * set had not been defined. The runtime flag has been added as a killswitch
 * in case the fix needs to be reverted.
 */
export declare function legacyIsTrustedSignal(target: object): boolean;
export declare function isTrustedSignal(target: object): boolean;
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