如何使用springdoc-openapi使可选的OpenAPI参数为空？

<dependency>
    <groupId>org.springdoc</groupId>
    <artifactId>springdoc-openapi-ui</artifactId>
    <version>1.5.12</version>
</dependency>

import org.springdoc.core.*;
import org.springframework.context.annotation.*;
import io.swagger.v3.oas.annotations.*;

@Configuration
@EnableOpenApi
public class OpenApiConfig {
    // 配置相关的Bean
}

import io.swagger.v3.oas.annotations.*;
import io.swagger.v3.oas.annotations.parameters.*;

@RestController
public class MyController {
    @Operation(summary = "My API")
    @GetMapping("/my-api")
    public String myApi(
            @Parameter(description = "Optional parameter", required = false) @RequestParam(required = false) String optionalParam) {
        // 处理逻辑
        return "Response";
    }
}