import * as postcss from 'postcss';
import type * as sassInternal from './sass-internal';
/**
 * An implementation of `postcss.Source` that lazily fills in the fields when
 * they're first accessed.
 */
export declare class LazySource implements postcss.Source {
    #private;
    constructor(inner: sassInternal.SassNode);
    /** @hidden */
    get dartSpan(): sassInternal.FileSpan;
    get start(): postcss.Position | undefined;
    set start(value: postcss.Position | undefined);
    get end(): postcss.Position | undefined;
    set end(value: postcss.Position | undefined);
    get input(): postcss.Input;
    set input(value: postcss.Input);
}