import { Plugin } from './plugin';
/**
 * Interface which describes a plugin registry filter.
 */
export interface PluginLookupFilter<PluginType extends Plugin = Plugin> {
    (plugin: PluginType): boolean;
}
/**
 * Interface which describes a plugin registry callback.
 */
export interface PluginLookupCallback<PluginType extends Plugin = Plugin> {
    (plugin: PluginType): Promise<PluginType>;
}
/**
 * Interface which describes a plugin registry.
 */
export interface PluginLookup<PluginBaseType extends Plugin = Plugin> {
    /**
     * Get a list of plugins in the registry optionally filtered.
     *
     * @param {PluginLookupFilter} [filter=null]
     *   Optional. A filter which should be applied to each plugin.
     *   Defaults to all available plugins.
     *
     * @return {Plugin[]}
     *   A list of plugins.
     */
    list(filter?: PluginLookupFilter<PluginBaseType>): PluginBaseType[];
    /**
     * Iterate through the plugin registry.
     *
     * @param {PluginLookupCallback} callback
     *   A callback which should be applied to each plugin.
     *
     * @returns {Promise<Plugin[]>}
     *   A promise to iterate through the plugins.
     */
    each(callback: PluginLookupCallback<PluginBaseType>): Promise<PluginBaseType[]>;
}