public void setFeUsage(CapacityUnit newFeUsage) {
    feUsage.get().setRcu(newFeUsage.getRcu());
    feUsage.get().setWcu(newFeUsage.getWcu());
  }
Set the frontend usage to the specified value.
@param newFeUsage new frontend usage values.
ambry-router/src/test/java/com/github/ambry/router/TestCUQuotaSourceFactory.java