syntax_data: {"ast_node_type":"other","tokens":[{"end":45,"kind":"keyword","start":0,"text":"f.write_str(&p.into_buffer())"}]}
source_snippet:                 f.write_str(&p.into_buffer())
context_before:                 p.pretty_print_const_valtree(cv, /*print_ty*/ true)?;
context_after:             });