/src/main/java/org/htmlunit/util/WebResponseWrapper.java
if ( webResponse == null) {   throw new IllegalArgumentException( "Wrapped WebResponse can't be null") ; }
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import org.htmlunit.WebResponse; public class WebResponseWrapper extends WebResponse { private final WebResponse wrappedWebResponse_; public WebResponseWrapper(final WebResponse webResponse) throws IllegalArgumentException { super(null, null, 0); if (webResponse == null) { <extra_id_0> } wrappedWebResponse_ = webResponse; } @Override public long getContentLength() { return wrappedWebResponse_.getContentLength();