I have a follow up question: I deleted lib.rs as you said. I have two crates, main.rs and main1.rs and a number of submodules in main.rs, this is the directory structure: tests/ - integrationtests.rs src/ - main.rs - module1/ -- mod.rs -- submodule1/ --- mod.rs - module2/ -- mod.rs - main1.rs //integrationtests.rs use main::*; // unresolved import: // unresolved module or use of unimported module "main1" use main1::*; #[test] fn testmain() { assert_eq!(main::module1::mod1string(), "mod1string"); assert_eq!(main::module2::mod2string(), "mod2string"); assert_eq!(main::module1::submodule1::mod1string(), "submod1string"); assert_eq!(main1::main1test(), "main1test"); } I followed the compiler suggestion and executed `cargo add main` but this throws an error for `cargp add main1`: `error: the crate `main1` could not be found in registry index.` Could you tell me what is wrong once more?

Master color choice for data visualizations: palette types, purposes, and accessibility tips for clear, inclusive charts.