Allow manual closing of underlying okHttpClient connection pool

src/main/java/com/binance/api/client/BinanceApiRestClient.java

@@ -295,4 +295,11 @@ public interface BinanceApiRestClient {
    * @param listenKey listen key that identifies a data stream
    */
   void closeUserDataStream(String listenKey);
+
+
+  /**
+   * Call to allow the client to shutdown cleanly instead of 
+   * waiting for connection timeouts.
+   */
+  void shutdown();
 }

src/main/java/com/binance/api/client/domain/general/RateLimitType.java

@@ -8,5 +8,6 @@
 @JsonIgnoreProperties(ignoreUnknown = true)
 public enum RateLimitType {
   REQUEST_WEIGHT,
-  ORDERS
+  ORDERS,
+  RAW_REQUESTS
 }

src/main/java/com/binance/api/client/impl/BinanceApiRestClientImpl.java

@@ -8,6 +8,8 @@
 import com.binance.api.client.domain.general.Asset;
 import com.binance.api.client.domain.general.ExchangeInfo;
 import com.binance.api.client.domain.market.*;
+
+import okhttp3.OkHttpClient;
 import retrofit2.Call;
 
 import java.util.List;
@@ -223,4 +225,12 @@ public void keepAliveUserDataStream(String listenKey) {
   public void closeUserDataStream(String listenKey) {
     executeSync(binanceApiService.closeAliveUserDataStream(listenKey));
   }
+
+
+  // Close and remove all idle connections in the pool
+  @Override
+  public void shutdown() {
+	  OkHttpClient okHttpClient = BinanceApiServiceGenerator.getSharedClient();
+	  okHttpClient.connectionPool().evictAll();
+  }
 }