message: Don't log object-object in line graph warnings.
diff: @@ -101,7 +101,7 @@ export class Line extends BaseGraph {
  const name = query && query.name;
  if (result.data.result.length === 0) {
  // eslint-disable-next-line no-console
  - console.warn(`Graph error: No data from query ${query}`);
  + console.warn(`Graph error: No data from query for ${name || query}.`);
  return;
  }
  const lineValues = result.data.result[0].values;
  