Refactor layout of pxd files

capnp/helpers/fixMaybe.h

@@ -0,0 +1,22 @@
+#include "kj/common.h"
+#include <stdexcept>
+
+template<typename T>
+T fixMaybe(::kj::Maybe<T> val) {
+  KJ_IF_MAYBE(new_val, val) {
+    return *new_val;
+  } else {
+    throw std::invalid_argument("member was null");
+  }
+}
+
+template<typename T>
+const char * getEnumString(T & val) {
+
+  auto maybe_val = val.which();
+  KJ_IF_MAYBE(new_val, maybe_val) {
+    return new_val->getProto().getName().cStr();;
+  } else {
+    return "";
+  }
+}