syntax_data: {"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"const"}]}
source_snippet:         const TAG_INVALID_SPAN: u8 = 1;
context_before:         const TAG_VALID_SPAN: u8 = 0;
context_after:         const TAG_RELATIVE_SPAN: u8 = 2;