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: mod.rs
    path of file: ./repos/nearcore/runtime/near-vm/vm/src/instance
    
    the code of the file until where you have to start completion: // This file contains code from external sources.
// Attributions: https://github.com/wasmerio/wasmer/blob/master/ATTRIBUTIONS.md

//! An `Instance` contains all the runtime state used by execution of
//! a WebAssembly module (except its callstack and register state). An
//! `InstanceRef` 
    
    pub unsafe fn finish_instantiation(&self) -> Result<(), Trap> {
        let instance = self.instance().as_ref();

        // Apply the initializers.
        initialize_tables(instance)?;
        initialize_memories(instance, instance.artifact.data_segments().iter().map(Into::into))?;

        // The WebAssembly spec specifies that the start function is
        // invoked automatically at instantiation time.
        instance.invoke_start_function()?;
        Ok(())
    }