I think I have the full extraction code.

src/renderer/renderer.rs

@@ -183,6 +183,13 @@ impl<'a> DustRenderer<'a> {
                     return Ok(rendered_content);
                 }
             }
+            DustTag::DTInlinePartial(named_block) => {
+                // Inline partials are blank during rendering (they get injected into blocks)
+                return Ok("".to_owned());
+            }
+            DustTag::DTBlock(named_block) => {
+                // TODO: Implement
+            }
             _ => (), // TODO: Implement the rest
         }
         Ok("".to_owned())