make caching system more robust

src/lib.rs

@@ -23,7 +23,10 @@ mod widgets;
 pub use crate::{
 	function_entry::{FunctionEntry, Riemann},
 	math_app::AppSettings,
-	misc::{decimal_round, option_vec_printer, resolution_helper, SteppedVector},
+	misc::{
+		decimal_round, option_vec_printer, resolution_helper, storage_create, storage_read,
+		SteppedVector,
+	},
 	widgets::{AutoComplete, Movement},
 };