src/main/java/grpc/gateway/protoc_gen_swagger/options/Openapiv2.java
public Builder clearOperationId() {
        
        operationId_ = getDefaultInstance().getOperationId();
        onChanged();
        return this;
      }
/**
       * <pre>
       * Unique string used to identify the operation. The id MUST be unique among
       * all operations described in the API. Tools and libraries MAY use the
       * operationId to uniquely identify an operation, therefore, it is recommended
       * to follow common programming naming conventions.
       * </pre>
       *
       * <code>string operation_id = 5;</code>
       * @return This builder for chaining.
       */

Unique string used to identify the operation. The id MUST be unique among
all operations described in the API. Tools and libraries MAY use the
operationId to uniquely identify an operation, therefore, it is recommended
to follow common programming naming conventions.

string operation_id = 5;
@return This builder for chaining.
Unique string used to identify the operation . The id MUST be unique among all operations described in the API . Tools and libraries MAY use the operationId to uniquely identify an operation therefore it is recommended to follow common programming naming conventions . string operation_id = 5 ; @return This builder for chaining .
public Builder clearOperationId() {
        operationId_ = getDefaultInstance().getOperationId();
        onChanged();
        return this;
      }
public Builder clearOperationId ( ) { operationId_ = getDefaultInstance ( ) . getOperationId ( ) ; onChanged ( ) ; return this ; }
<pre>
 Unique string used to identify the operation.
<pre > Unique string used to identify the operation .