import type { Printable } from "./protoplugin/ecmascript/index.js";
import { DescExtension, DescField } from "./descriptor-set.js";
export declare function unixMilliToDate(unixMilliseconds: bigint): Date;
export declare function getFieldTypeInfo(field: DescField | DescExtension): {
    typing: Printable;
    optional: boolean;
    typingInferrableFromZeroValue: boolean;
};
/**
 * Return a printable expression for the default value of a field.
 * Only applicable for singular scalar and enum fields.
 */
export declare function getFieldDefaultValueExpression(field: DescField | DescExtension, enumAs?: "enum_value_as_is" | "enum_value_as_integer" | "enum_value_as_cast_integer"): Printable | undefined;
/**
 * Return a printable expression for the zero value of a field.
 *
 * Returns either:
 * - empty array literal for repeated fields
 * - Object.create(null) for maps
 * - undefined for message fields
 * - an enums first value
 * - scalar zero value
 */
export declare function getFieldZeroValueExpression(field: DescField | DescExtension, enumAs?: "enum_value_as_is" | "enum_value_as_integer" | "enum_value_as_cast_integer"): Printable | undefined;