/**
 * Slayer Extend class
 * Represents a slayer reward that increases task requirements
 * Reference: https://oldschool.runescape.wiki/w/Slayer#Rewards
 */
export declare class SlayerExtend {
    readonly name: string;
    readonly cost: number;
    readonly notes: string;
    readonly appliesTo?: string[];
    constructor(data: {
        name: string;
        cost: number;
        notes: string;
        appliesTo?: string[];
    });
    /**
     * Get the extend name
     */
    getName(): string;
    /**
     * Get the cost in slayer points
     */
    getCost(): number;
    /**
     * Get the notes/description of the extend
     */
    getNotes(): string;
    /**
     * Get the tasks this extend applies to
     */
    getAppliesToTasks(): string[] | undefined;
}
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