export interface RefSpan {
    start: number;
    end: number;
}
export interface ApplyRefResult {
    text: string;
    caret: number;
    span: RefSpan;
}
export declare function caretAcceptsReference(text: string, caretIndex: number): boolean;
export declare function applyReferenceAtCaret(text: string, caretIndex: number, ref: string, activeSpan: RefSpan | null): ApplyRefResult;