import { ITaskHandler } from "./types";
import { AbsContextual, MaybeContextualArg } from "../utils/ContextualLoggedClass";
import { TaskContext } from "./TaskContext";
export declare abstract class TaskHandler<I, O> extends AbsContextual<TaskContext> implements ITaskHandler<I, O> {
    private _type?;
    get type(): string;
    protected constructor();
    protected runPrefix(input: I, ...args: MaybeContextualArg<TaskContext>): Promise<any[]>;
    protected runSuffix(output: O, ctx: TaskContext): O;
    abstract run(input: I, ctx: TaskContext): Promise<O>;
}