syntax_data: {"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"\"how"}]}
source_snippet:         "how detailed `#[derive(Debug)]` should be. `full` prints types recursively, \
context_before:     fmt_debug: FmtDebug = (FmtDebug::Full, parse_fmt_debug, [TRACKED],
context_after:         `shallow` prints only type names, `none` prints nothing and disables `{:?}`. (default: `full`)"),