`symbols_find_typenames_as_string()` uses `symbols_find_typenames_as_string()`, which itself uses `tm_workspace::typename_array`. This is filled *only* with what is deemed a "typename", which currently has to match `TM_GLOBAL_TYPE_MASK` (which is any of `tm_tag_class_t`, `tm_tag_enum_t`, `tm_tag_interface_t`, `tm_tag_struct_t`, `tm_tag_typedef_t`, `tm_tag_union_t` or `tm_tag_namespace_t`). This doesn't include functions you get from the parser.