Module data 

Structs

DataMap

Untyped data map: maps (node_id, key) → DataValue. This is the Rust-side of the JS node.data map. When a JS plugin runs after a Rust plugin, this gets synced to the JS DataMap.

TypedDataMap

Typed data map: stores strongly-typed data keyed by TypeId + node_id. Rust-only, never crosses to JS.

Enums

DataValue

A value that can be stored in the untyped data map (interoperable with JS node.data).