/// Dense internal node identifier. Assigned sequentially by the writer;
/// user-facing keys map to these via the key index.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]pubstructNodeId(pub u64);/// Interned edge label. Label strings live in the manifest's label table;
/// segments store only this id.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]pubstructEdgeLabel(pub u32);