declare type symbolType = 'note' | 'halfBarline';
declare type noteDuration = 'quarterNote' | 'brevis';
interface NoteOptions {
    duration: noteDuration;
    pitch: string;
}
interface SymbolConstructorOptions {
    type: symbolType;
}
export declare class NotationSymbol {
    type: symbolType;
    constructor(options: SymbolConstructorOptions);
}
export declare class HalfBarline extends NotationSymbol {
    constructor();
}
export declare class Note extends NotationSymbol {
    duration: noteDuration;
    pitch: string;
    hasBrackets: boolean;
    constructor(noteOptions: NoteOptions);
    addBrackets(): Note;
}
export declare class BreveNote extends Note {
    constructor(pitch: string);
}
export {};