Move Pipeline struct definition after Layer in quad submodules

wgpu/src/quad/solid.rs

@@ -15,11 +15,6 @@ pub struct Solid {
     pub quad: Quad,
 }
 
-#[derive(Debug)]
-pub struct Pipeline {
-    pipeline: wgpu::RenderPipeline,
-}
-
 #[derive(Debug)]
 pub struct Layer {
     instances: Buffer<Solid>,
@@ -54,6 +49,11 @@ impl Layer {
     }
 }
 
+#[derive(Debug)]
+pub struct Pipeline {
+    pipeline: wgpu::RenderPipeline,
+}
+
 impl Pipeline {
     pub fn new(
         device: &wgpu::Device,