message: Warn about unhandled export AST node types.
diff: @@ -725,6 +725,10 @@ function handleJsExport(
  fromModuleSpecifier: node.source && node.source.value,
  }));
  }
  +
  + } else {
  + console.warn(
  + `Export feature with AST node type ${node.type} not supported.`);
  }
  }
  