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: vm.rs
    path of file: ./repos/wasmer/lib/api/src/jsc
    
    the code of the file until where you have to start completion: /// This module is mainly used to create the `VM` types that will hold both
/// the JS values of the `Memory`, `Table`, `Global` and `Function` and also
/// it's types.
/// This module should not be needed any longer (with the exception of the memory)
/// once the type reflection is added to the WebAssembly JS API.
/// https://github.com/WebAssembly/js-types/
use crate::store::AsStoreRef;
use rusty_jsc::{JSObject, JSObjectCallAsFunctionCallback, JSValue};
use std::any::Any;
use std::fmt;
use tracing::trace;
use wasmer_types::RawValue;
use wasmer_types::{
    FunctionType, GlobalType, MemoryError, MemoryType, Pages, TableType, WASM_PAGE_SIZE,
};

/// Represents linear memory that is managed by the javascript runtime
#[derive(Clone, Debug, PartialEq)]
pub struct VMMemory {
    pub(crate) memory: JSObject,
    pub(crate) ty: MemoryType,
}

unsafe impl Send for VMMemory {}
unsafe impl Sync for VMMemory {}

impl VMMemory {
    /// Creates a new memory directly from a WebAssembly javascript object
    pub fn new(memory: JSObject, ty: MemoryType) -> Self {
        Self { memory, ty }
    }

    /// Returns the size of the memory buffer in pages
    pub fn get_runtime_size(&self) -> u32 {
        unimplemented!();
        // let dummy: DummyBuffer = match serde_wasm_bindgen::from_value(self.memory.buffer()) {
        //     Ok(o) => o,
        //     Err(_) => return 0,
        // };
        // if dummy.byte_length == 0 {
        //     return 0;
        // }
        // dummy.byte_length / WASM_PAGE_SIZE as u32
    }

    /// Attempts to clone this memory (if its clonable)
    pub(crate) fn try_cl
    
    pub fn copy(&self, store: &impl AsStoreRef) -> Result<VMMemory, wasmer_types::MemoryError> {
        let new_memory =
            crate::jsc::externals::memory::Memory::js_memory_from_type(&store, &self.ty)?;

        trace!("memory copy started");

        let src = crate::jsc::externals::memory_view::MemoryView::new_raw(&self.memory, store);
        let amount = src.data_size() as usize;
        let mut dst = crate::jsc::externals::memory_view::MemoryView::new_raw(&new_memory, store);
        let dst_size = dst.data_size() as usize;

        // if amount > dst_size {
        //     let delta = amount - dst_size;
        //     let pages = ((delta - 1) / WASM_PAGE_SIZE) + 1;

        //     let our_js_memory: &crate::jsc::externals::memory::JSMemory =
        //         JsCast::unchecked_from_js_ref(&new_memory);
        //     our_js_memory.grow(pages as u32).map_err(|err| {
        //         if err.is_instance_of::<js_sys::RangeError>() {
        //             let cur_pages = dst_size;
        //             MemoryError::CouldNotGrow {
        //                 current: Pages(cur_pages as u32),
        //                 attempted_delta: Pages(pages as u32),
        //             }
        //         } else {
        //             MemoryError::Generic(err.as_string().unwrap())
        //         }
        //     })?;

        //     dst = crate::jsc::externals::memory_view::MemoryView::new_raw(&new_memory);
        // }

        src.copy_to_memory(amount as u64, &dst).map_err(|err| {
            wasmer_types::MemoryError::Generic(format!("failed to copy the memory - {}", err))
        })?;

        trace!("memory copy finished (size={})", dst.size().bytes().0);

        Ok(Self {
            memory: new_memory,
            ty: self.ty.clone(),
        })
    }