pub fn walk_flat_map_generic_param<T: MutVisitor>(
vis: &mut T,
param: GenericParam,
) -> SmallVec<[GenericParam; 1]>
pub fn walk_flat_map_generic_param<T: MutVisitor>(
vis: &mut T,
param: GenericParam,
) -> SmallVec<[GenericParam; 1]>