import { FieldConditionalHandlingProcedureOptions } from "../../models/interfaces/field-conditional-handling-procedure-options";
export declare const NULLABLE = "nullable";
export declare const nullable: ({ fieldValue, fieldName, args, context }: {
    fieldValue: any;
    fieldName: any;
    args: any;
    context: any;
}) => boolean;
export declare function Nullable(options?: FieldConditionalHandlingProcedureOptions): PropertyDecorator;