message: rm extra div
diff: @@ -13,7 +13,6 @@ import ExampleFetchComponent from '../ExampleFetchComponent';
  const ExampleComponent: FC<{}> = () => (
  <Page theme={pageTheme.tool}>
  - <div className={classes.mainContentArea}>
  <Header title="Welcome to {{ id }}!" subtitle="Optional subtitle">
  <HeaderLabel label="Owner" value="Team X" />
  <HeaderLabel label="Lifecycle" value="Alpha" />
  @@ -24,7 +23,6 @@ const ExampleComponent: FC<{}> = () => (
  container
  spacing={3}
  direction="column"
  - className={classes.pageBody}
  >
  <Grid item>
  <InfoCard title="Information card" maxWidth>
  @@ -40,7 +38,6 @@ const ExampleComponent: FC<{}> = () => (
  </Grid>
  </Grid>
  </Content>
  - </div>
  </Page>
  );
  