fix:fix NPE.

spring-cloud-tencent-rpc-enhancement/src/main/java/com/tencent/cloud/rpc/enhancement/feign/DefaultEnhancedFeignPluginRunner.java

@@ -18,12 +18,11 @@
 
 package com.tencent.cloud.rpc.enhancement.feign;
 
-import java.util.ArrayList;
 import java.util.Comparator;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 
+import com.google.common.collect.ArrayListMultimap;
+import com.google.common.collect.Multimap;
 import com.tencent.cloud.rpc.enhancement.feign.plugin.EnhancedFeignContext;
 import com.tencent.cloud.rpc.enhancement.feign.plugin.EnhancedFeignPlugin;
 import com.tencent.cloud.rpc.enhancement.feign.plugin.EnhancedFeignPluginType;
@@ -37,18 +36,13 @@ import org.springframework.util.CollectionUtils;
  */
 public class DefaultEnhancedFeignPluginRunner implements EnhancedFeignPluginRunner {
 
-	private Map<String, List<EnhancedFeignPlugin>> pluginMap = new HashMap<>();
+	private final Multimap<String, EnhancedFeignPlugin> pluginMap = ArrayListMultimap.create();
 
 	public DefaultEnhancedFeignPluginRunner(List<EnhancedFeignPlugin> enhancedFeignPlugins) {
 		if (!CollectionUtils.isEmpty(enhancedFeignPlugins)) {
 			enhancedFeignPlugins.stream()
 					.sorted(Comparator.comparing(EnhancedFeignPlugin::getOrder))
-					.forEach(plugin -> {
-						if (!pluginMap.containsKey(plugin.getType().name())) {
-							pluginMap.put(plugin.getType().name(), new ArrayList<>());
-						}
-						pluginMap.get(plugin.getType().name()).add(plugin);
-					});
+					.forEach(plugin -> pluginMap.put(plugin.getType().name(), plugin));
 		}
 	}