syntax_data: {"ast_node_type":"other","tokens":[{"end":21,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// `BlockEntry`.
context_before:     /// An iterator over all possible `SeekTarget`s in a given block in order, starting with
context_after:     fn iter_in_block(body: &mir::Body<'_>, block: BasicBlock) -> impl Iterator<Item = Self> {