import type ExtensionRegistry from "../../api/registry/ExtensionRegistry.ts";
import type ExtensionEntry from "../../api/plugin_repository/ExtensionEntry.ts";
/**
 * Simple implementation of an {@link ExtensionRegistry} using an in-memory map.
 */
export default class InMemoryExtensionRegistry implements ExtensionRegistry {
    private readonly extensionEntriesByHandle;
    private readonly extensionEntriesByExtensionPoint;
    /**
     * @inheritDoc
     *
     * @throws *Error* if the specified Extension handle has already been registered
     */
    register(extensionHandle: string, extensionEntry: ExtensionEntry): Promise<void>;
    /**
     * @inheritDoc
     *
     * @throws *Error* if the specified Extension handle has not been registered
     */
    get(extensionHandle: string): Promise<Readonly<ExtensionEntry>>;
    getExtensions(extensionPoint: string): Promise<ReadonlyMap<string, ExtensionEntry>>;
}
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