import { TCallRole, TCallRoleParticipant, TCallRoleSpectatorSynthetic, TCallRoleSpectator } from './types';
export declare const hasParticipant: (role: TCallRole) => role is TCallRoleParticipant;
export declare const hasSpectatorSynthetic: (role: TCallRole) => role is TCallRoleSpectatorSynthetic;
export declare const hasSpectator: (role: TCallRole) => role is TCallRoleSpectator;
export declare const isExitingSpectatorRole: (prev: TCallRole, next: TCallRole) => boolean;
export declare const isEnteringSpectatorRole: (_prev: TCallRole, next: TCallRole) => next is TCallRoleSpectator;
export declare const isExitingAnySpectatorRole: (prev: TCallRole, next: TCallRole) => boolean;
export declare const isEnteringAnySpectatorRole: (prev: TCallRole, next: TCallRole) => boolean;