import { FieldSetModel, BasicModel, ModelRef } from './models';
export declare function noop(): void;
export declare function last<T>(arr: T[]): T | null;
export declare const id: <T>(it: T) => T;
export declare function isPlainObject(value: unknown): value is object;
export declare function removeOnUnmount<Model extends BasicModel<any>>(field: string | BasicModel<any> | ModelRef<any, any, Model>, model: BasicModel<any>, parent: FieldSetModel): void;
export declare type $MergeProps<T> = (T extends any ? (t: T) => void : never) extends (r: infer R) => void ? R : never;
export declare const isNil: <T>(value: T) => value is Exclude<T, null | undefined>;
export declare const isArray: (arg: any) => arg is any[];
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