import { FieldConstraintProcedureOptions } from "../../../models/interfaces/field-constraint-procedure-options";
export declare const IS_NUMBER_STRING = "is_string_number";
export declare const isNumberString: ({ fieldValue }: {
    fieldValue: any;
}) => boolean;
export declare const isNumberStringMessageBuilder: ({ fieldName }: {
    fieldName: any;
}) => string;
export declare function IsNumberString(options?: FieldConstraintProcedureOptions): PropertyDecorator;