n must be non null!"); } this.fixedDescription = description; } @Override public final void describeTo(Description description) { description.appendText(fixedDescription); } } org/hamcrest/Description.java org/hamcrest/Description.java package org.hamcrest; /** * A description of a Matcher. A Matcher will describe itself to a description * which can later be used for reporting. * * @see Matcher#describeTo(Description) */ public interface Description { /** * A description that consumes input but does...