syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // the rightmost flag). We do this by finding the (rightmost) position of both flags and
context_before:     // we need to work out manually which should take precedence if both are supplied (i.e.
context_after:     // comparing them. Note that if a flag is not found, its position will be `None`, which