Function walk_stmt 

pub fn walk_stmt<'arena, 'src, V: Visitor<'arena, 'src> + ?Sized>(
    visitor: &mut V,
    stmt: &Stmt<'arena, 'src>,
) -> ControlFlow<()>

Dispatches stmt to the appropriate child visitors based on its StmtKind.

Call this from Visitor::visit_stmt to recurse into a statement’s children. Omit the call to skip the subtree entirely.