public GetIntegrationResult addRequestParametersEntry(String key, String value) {
        if (null == this.requestParameters) {
            this.requestParameters = new java.util.HashMap<String, String>();
        }
        if (this.requestParameters.containsKey(key))
            throw new IllegalArgumentException("Duplicated keys (" + key.toString() + ") are provided.");
        this.requestParameters.put(key, value);
        return this;
    }
Add a single RequestParameters entry

@see GetIntegrationResult#withRequestParameters
@returns a reference to this object so that method calls can be chained together.
aws-java-sdk-apigatewayv2/src/main/java/com/amazonaws/services/apigatewayv2/model/GetIntegrationResult.java