syntax_data: {"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let multibyte_test = _mm_cmplt_epi8(chunk, _mm_set1_epi8(0));
context_before:                 // indicates that it's part of a UTF-8 char.
context_after:                 // Create a bit mask from the comparison results.