export declare class Code {
    code: string;
    system?: string | undefined;
    version?: string | undefined;
    display?: string | undefined;
    constructor(code: string, system?: string | undefined, version?: string | undefined, display?: string | undefined);
    get isCode(): boolean;
    hasMatch(code: any): any;
}
export declare class Concept {
    codes: any[];
    display?: string | undefined;
    constructor(codes: any[], display?: string | undefined);
    get isConcept(): boolean;
    hasMatch(code: any): any;
}
export declare abstract class Vocabulary {
    id: string;
    version?: string | undefined;
    name?: string | undefined;
    constructor(id: string, version?: string | undefined, name?: string | undefined);
}
export declare class CodeSystem extends Vocabulary {
    id: string;
    version?: string | undefined;
    name?: string | undefined;
    constructor(id: string, version?: string | undefined, name?: string | undefined);
}
export declare class CQLValueSet extends Vocabulary {
    id: string;
    version?: string | undefined;
    name?: string | undefined;
    codesystems?: CodeSystem[] | undefined;
    constructor(id: string, version?: string | undefined, name?: string | undefined, codesystems?: CodeSystem[] | undefined);
    get isValueSet(): boolean;
}
export declare class ValueSet {
    oid: string;
    version?: string | undefined;
    codes: any[];
    constructor(oid: string, version?: string | undefined, codes?: any[]);
    /**
     * Determines if the provided code matches any code in the current set.
     * If the input is a single string, it checks for a direct match with the
     * codes in the set, ensuring all code systems are consistent. Throws an
     * error if multiple code systems exist and a match is found, indicating
     * ambiguity. For other inputs, it checks for any matching codes using
     * the `codesInList` function. Used for the `code in valueset` operation.
     *
     * @param code - The code to be checked for a match, which can be a string
     *               or an object containing codes.
     * @returns {boolean} True if a match is found, otherwise false.
     * @throws {Error} If a match is found with multiple code systems present.
     */
    hasMatch(code: any): any;
    /**
     * Expands the current set of codes by returning a list of unique `Code` objects.
     * This method filters out duplicate codes from the `codes` array, ensuring each
     * code appears only once in the returned list. Use for the ExpandValueset operator
     *
     * @returns {Code[]} An array of unique `Code` objects.
     */
    expand(): Code[];
}