type MutationMeta = Register extends object ? TMutationMeta extends Record<string, unknown> ? TMutationMeta : Record<string, unknown> : Record<string, unknown>;Defined in: packages/query-core/src/types.ts:1837
The type of the meta object that can be attached to a mutation and read back from mutationFn, callbacks and cache-level handlers. Defaults to Record<string, unknown>; declare mutationMeta on Register to narrow it.