syntax_data: {"ast_node_type":"function","tokens":[{"end":90,"kind":"keyword","start":0,"text":"pub(crate)"}]}
source_snippet:     pub(crate) fn build_user_type_projections(&self) -> Option<Box<UserTypeProjections>> {
context_before:     /// Assembles this chain of user-type projections into a proper data structure.
context_after:         // If we know there's nothing to do, just return None immediately.