wasm_split_macros is a procedural macro. It will run at compile time and transform your program's source code.
Adding wasm_split_macros macro(s) as a dependency
Run this command in a terminal, in your project's directory:
cargo add wasm_split_macros
To add it manually, edit your project's Cargo.toml file and add to the [dependencies] section:
wasm_split_macros = "0.2.0"
You may need to import the macro(s) with use wasm_split_macros::*.
wasm_split_macros documentation.