import { Source } from "./source.js";
export declare class SourceBase<F extends Source.Fragment = Source.Fragment> implements Source<F> {
    #private;
    /**
     * Called to parse all fragments in this source.
     */
    protected parse(): F[];
    /**
     * Called to create an updated version of this source.
     */
    update?(context: Source.UpdateContext): Source.UpdateResult;
    /**
     * Get an array of filenames that this source is compiled to.
     *
     * If this is not implemented or returns an empty array,
     * fragment ids from this source are added to the
     * manifest as global fragments.
     */
    getOutputFilenames?(): string[];
    /**
     * An array of all fragments in this source.
     */
    get fragments(): readonly F[];
    /**
     * A map of ids to fragments.
     *
     * Note that this may not contain all fragments if there are any duplicate fragment ids.
     */
    get fragmentMap(): ReadonlyMap<string, F>;
}