export declare function isAmericanSocialLeague(league: string | null | undefined): boolean;
export declare function isAmericanSocialSport(sport: string | null | undefined): boolean;
export declare function isAllowedAmericanTrend(signal: {
    trend_type: string;
    sport: string | null;
    league: string | null;
    data?: Record<string, unknown>;
}): boolean;
export declare function isAllowedAmericanContent(content: {
    content_type?: string | null;
    sport?: string | null;
    league?: string | null;
    source_data?: Record<string, unknown> | null;
}): boolean;
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