import { Field } from 'protobufjs';
import { SchemaNodeData } from '../../types/schema';
type HashMap = Record<string, unknown>;
export declare function visit(obj: SchemaNodeData, field: Field): void;
export declare function findRootOption(field: Field, optionPrefix: string): null | HashMap;
export declare function protocGenValidate(option: HashMap, obj: SchemaNodeData): void;
export declare function isOptional(field: Field): boolean;
export {};