syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// to `proj_capture` or `proj_possible_ancestor` is same as `proj_capture`,
context_before: /// Return true if the `proj_possible_ancestor` represents an ancestor path
context_after: /// assuming they both start off of the same root variable.