Function NewStringFromKnownLiveLatin1Buffer 

pub unsafe extern "C" fn NewStringFromKnownLiveLatin1Buffer(
    cx: *mut JSContext,
    buffer: *mut StringBuffer,
    length: usize,
) -> *mut JSString

Like NewStringFromLatin1Buffer, but can be used to avoid refcounting overhead in cases where the returned string doesn’t use the buffer. The caller must ensure the buffer outlives this call.