{"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"//!"}]}
//! from the ide with completions, hovers, etc. It is a (soft, internal) boundary:
//! `hir` is what insulates the "we don't know how to actually write an incremental compiler"
//! <https://www.tedinski.com/2018/02/06/system-boundaries.html>.