Make some functions and constructors package-private if necessary

src/main/java/io/milvus/client/DescribeIndexResponse.java

@@ -29,7 +29,7 @@ public class DescribeIndexResponse {
   private final Response response;
   private final Index index;
 
-  public DescribeIndexResponse(Response response, @Nullable Index index) {
+  DescribeIndexResponse(Response response, @Nullable Index index) {
     this.response = response;
     this.index = index;
   }

src/main/java/io/milvus/client/DescribeTableResponse.java

@@ -30,7 +30,7 @@ public class DescribeTableResponse {
   private final Response response;
   private final TableSchema tableSchema;
 
-  public DescribeTableResponse(Response response, @Nullable TableSchema tableSchema) {
+  DescribeTableResponse(Response response, @Nullable TableSchema tableSchema) {
     this.response = response;
     this.tableSchema = tableSchema;
   }

src/main/java/io/milvus/client/GetTableRowCountResponse.java

@@ -27,7 +27,7 @@ public class GetTableRowCountResponse {
   private final Response response;
   private final long tableRowCount;
 
-  public GetTableRowCountResponse(Response response, long tableRowCount) {
+  GetTableRowCountResponse(Response response, long tableRowCount) {
     this.response = response;
     this.tableRowCount = tableRowCount;
   }

src/main/java/io/milvus/client/HasTableResponse.java

@@ -26,7 +26,7 @@ public class HasTableResponse {
   private final Response response;
   private final boolean hasTable;
 
-  public HasTableResponse(Response response, boolean hasTable) {
+  HasTableResponse(Response response, boolean hasTable) {
     this.response = response;
     this.hasTable = hasTable;
   }

src/main/java/io/milvus/client/InsertResponse.java

@@ -28,7 +28,7 @@ public class InsertResponse {
   private final Response response;
   private final List<Long> vectorIds;
 
-  public InsertResponse(Response response, List<Long> vectorIds) {
+  InsertResponse(Response response, List<Long> vectorIds) {
     this.response = response;
     this.vectorIds = vectorIds;
   }

src/main/java/io/milvus/client/SearchResponse.java

@@ -120,7 +120,7 @@ public class SearchResponse {
     private final long vectorId;
     private final float distance;
 
-    public QueryResult(long vectorId, float distance) {
+    QueryResult(long vectorId, float distance) {
       this.vectorId = vectorId;
       this.distance = distance;
     }

src/main/java/io/milvus/client/ShowTablesResponse.java

@@ -29,7 +29,7 @@ public class ShowTablesResponse {
   private final Response response;
   private final List<String> tableNames;
 
-  public ShowTablesResponse(Response response, List<String> tableNames) {
+  ShowTablesResponse(Response response, List<String> tableNames) {
     this.response = response;
     this.tableNames = tableNames;
   }