GRPC_ARG_TCP_MIN_READ_CHUNK_SIZE

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
extern (C)
static if(!is(typeof(GRPC_ARG_TCP_MIN_READ_CHUNK_SIZE)))
enum GRPC_ARG_TCP_MIN_READ_CHUNK_SIZE = "grpc.experimental.tcp_min_read_chunk_size";

Meta