import MessageBus from '../../utility/message-bus/messageBus';
import type { TectonPlatformControls } from '../../types/setup';
/**
 * Sets up theme-related capabilities including `getCurrentTheme` and `themeChanged` broadcasting.
 * Manages theme state and broadcasts theme changes to all features.
 *
 * @param messageBus - The platform message bus for feature communication
 * @param platformControlBus - Platform control bus with handler implementations
 * @param capabilities - Set to populate with available capability names
 * @param teardowns - Array to collect cleanup functions for unsubscribing
 *
 * @internal
 */
export default function setupTectonStyles(messageBus: MessageBus, platformControlBus: TectonPlatformControls, capabilities: Set<string>, teardowns: (() => void)[]): void;
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