public ApiGatewayClientConfiguration proxyConfiguration(ProxyConfiguration proxyConfiguration) {
        setProxyConfiguration(proxyConfiguration);
        return this;
    }
Sets the proxy configuration of a client.

@param proxyConfiguration The proxy configuration of the client.
@return This object for method chaining.
aws-java-sdk-opensdk/src/main/java/com/amazonaws/opensdk/internal/config/ApiGatewayClientConfiguration.java