pub unsafe extern "C" fn store_get_storedir(
context: *mut c_context,
store: *mut Store,
callback: get_string_callback,
user_data: *mut c_void,
) -> errExpand description
@brief get the storeDir of a Nix store, typically "/nix/store"
@param[out] context Optional, stores error information
@param[in] store nix store reference
@param[in] callback Called with the URI.
@param[in] user_data optional, arbitrary data, passed to the callback when it’s called.
@see nix_get_string_callback
@return error code, NIX_OK on success.