@com.fasterxml.jackson.annotation.JsonProperty("requestId")
    public void setRequestId(String requestId) {
        this.requestId = requestId;
    }
<p>
The ID of the request in which the parameter is missing.
</p>

@param requestId
       The ID of the request in which the parameter is missing.
aws-java-sdk-neptunedata/src/main/java/com/amazonaws/services/neptunedata/model/MissingParameterException.java