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use super::transl8::{impl_magic, impl_wrapper, FromV8, ToV8};use crate::Error;
impl_wrapper!(  pub struct U16String(Vec<u16>););impl_magic!(U16String);
impl ToV8 for U16String {  fn to_v8<'a>(    &mut self,    scope: &mut v8::HandleScope<'a>,  ) -> Result<v8::Local<'a, v8::Value>, crate::Error> {    let maybe_v =      v8::String::new_from_two_byte(scope, self, v8::NewStringType::Normal);
    // 'new_from_two_byte' can return 'None' if buffer length > kMaxLength.    if let Some(v) = maybe_v {      Ok(v.into())    } else {      Err(Error::Message(String::from(        "Cannot allocate String from UTF-16: buffer exceeds maximum length.",      )))    }  }}
impl FromV8 for U16String {  fn from_v8(    scope: &mut v8::HandleScope,    value: v8::Local<v8::Value>,  ) -> Result<Self, crate::Error> {    let v8str = v8::Local::<v8::String>::try_from(value)      .map_err(|_| Error::ExpectedString)?;    let len = v8str.length();    let mut buffer = Vec::with_capacity(len);    #[allow(clippy::uninit_vec)]    // SAFETY: we set length == capacity (see previous line),    // before immediately writing into that buffer and sanity check with an assert    unsafe {      buffer.set_len(len);      let written = v8str.write(        scope,        &mut buffer,        0,        v8::WriteOptions::NO_NULL_TERMINATION,      );      assert!(written == len);    }    Ok(buffer.into())  }}