import { Token } from './token';
import { StringTrait, TraitType } from './token-metadata';
import { TokenStandard } from './token-standard';
export type CollectionTrait = {
    trait: StringTrait;
    totalTokens: number;
};
export declare class Collection {
    private _name;
    private _tokens;
    private _traitsFrequencyCounts;
    constructor(tokens: Token[], name?: string);
    get name(): string;
    get tokens(): Token[];
    get tokenTotalSupply(): number;
    get traitsFrequencyCounts(): Map<string, Map<string, number>>;
    tokenStandards(): TokenStandard[];
    /**
     * @description Return the number of tokens owning the trait.
     * @param trait
     */
    totalTokensWithTrait(trait: StringTrait): number;
    extractNullTraits(): Map<TraitType, CollectionTrait>;
    extractCollectionTraits(): Map<TraitType, CollectionTrait[]>;
    /**
     * @description Count the number of occurrence of each trait. Use traitName and traitValue to uniquely identify a trait.
     */
    private deriveNormalizedTraitsFrequencyCounts;
}