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

@see TestInvokeAuthorizerRequest#withAdditionalContext
@returns a reference to this object so that method calls can be chained together.
aws-java-sdk-api-gateway/src/main/java/com/amazonaws/services/apigateway/model/TestInvokeAuthorizerRequest.java