syntax_data: {"ast_node_type":"other","tokens":[{"end":102,"kind":"keyword","start":0,"text":"next_solver:"}]}
source_snippet:     next_solver: NextSolverConfig = (NextSolverConfig::default(), parse_next_solver_config, [TRACKED],
context_before:         "allow crates to be namespaced by other crates (default: no)"),
context_after:         "enable and configure the next generation trait solver used by rustc"),