syntax_data: {"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // However, in the case of a multibyte character, where the width != 1, the next span should
context_before:         // If the width is 1, then the next span should only contain the next char besides current ending.
context_after:         // span multiple bytes to include the whole character.