syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"LangItem::ShlAssign"}]}
source_snippet:         LangItem::ShlAssign => "shl_assign",
context_before:         LangItem::BitOrAssign => "bitor_assign",
context_after:         LangItem::ShrAssign => "shr_assign",