IMemoizeParam

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Classes that implement IMemoizeParam may be used as parameters on <<__Memoize>> functions

Guides

• Introduction
• Special

Interface Synopsis

namespace HH;

interface IMemoizeParam {...}

Public Methods

• ->getInstanceKey(): string
  Serialize this object to a string that can be used as a dictionary key to differentiate instances of this class