syntax_data: {"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"self.lines().partition_point(|x|"}]}
source_snippet:         self.lines().partition_point(|x| x <= &pos).checked_sub(1)
context_before:     pub fn lookup_line(&self, pos: RelativeBytePos) -> Option<usize> {
context_after:     }