You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: tests.rs
    path of file: ./repos/wasmi/crates/wasmi/src/module/instantiate
    
    the code of the file until where you have to start completion: //! Regression tests for GitHub issue:
//! https://github.com/paritytech/wasmi/issues/587
//!
//! The problem was that Wasm me
    
fn try_instantiate_from_wat(wat: &str) -> Result<(Store<()>, Instance), Error> {
    let wasm = wat::parse_str(wat).unwrap();
    let engine = Engine::default();
    let module = Module::new(&engine, &mut &wasm[..])?;
    let mut store = Store::new(&engine, ());
    let mut linker = <Linker<()>>::new(&engine);
    // Define one memory that can be used by the tests as import.
    let memory_type = MemoryType::new(4, None)?;
    let memory = Memory::new(&mut store, memory_type)?;
    linker.define("env", "memory", memory)?;
    // Define one table that can be used by the tests as import.
    let table_type = TableType::new(ValueType::FuncRef, 4, None);
    let init = Value::default(table_type.element());
    let table = Table::new(&mut store, table_type, init)?;
    linker.define("env", "table", table)?;
    let instance = linker
        .instantiate(&mut store, &module)
        .unwrap()
        .start(&mut store)?;
    Ok((store, instance))
}