Function mozjs::jsapi::JS::GetArrayBufferByteLength

pub unsafe extern "C" fn GetArrayBufferByteLength(
    obj: *mut JSObject
) -> usize

Return the available byte length of an ArrayBuffer.

|obj| must have passed a JS::IsArrayBufferObject test, or somehow be known that it would pass such a test: it is an ArrayBuffer or a wrapper of an ArrayBuffer, and the unwrapping will succeed.