usestd::sync::Arc;/// GPU context used by plot elements to build viewport-aware GPU geometry.
////// On wasm, some geometry generation is deferred until render-time so we can incorporate the
/// current viewport pixel size (e.g. to convert `LineWidth` pixels → data units).
pubstructGpuPackContext<'a>{pubdevice:&'aArc<wgpu::Device>,
pubqueue:&'aArc<wgpu::Queue>,
}