Constant GGML_TYPES_SOURCE 

pub const GGML_TYPES_SOURCE: &str = "github.com/ggml-org/llama.cpp: ggml/include/ggml.h `enum ggml_type`; \
     ggml/src/ggml.c `type_traits` (.blck_size, .type_size = sizeof(block_*)); ggml/src/ggml-common.h \
     `static_assert(sizeof(block_*) == …)`";

Where ggml’s block arithmetic is read from.