docs: public void marshall(IdentityPoolUsage identityPoolUsage, ProtocolMarshaller protocolMarshaller) {
  
          if (identityPoolUsage == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(identityPoolUsage.getIdentityPoolId(), IDENTITYPOOLID_BINDING);
              protocolMarshaller.marshall(identityPoolUsage.getSyncSessionsCount(), SYNCSESSIONSCOUNT_BINDING);
              protocolMarshaller.marshall(identityPoolUsage.getDataStorage(), DATASTORAGE_BINDING);
              protocolMarshaller.marshall(identityPoolUsage.getLastModifiedDate(), LASTMODIFIEDDATE_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }