@@ -0,0 +1,385 @@
+package org.mutabilitydetector.benchmarks.mutabletofield;%0A%0Aimport java.util.Date;%0A%0Aimport javax.annotation.concurrent.Immutable;%0A%0A@Immutable%0Apublic final class HasDateField %7B%0A    private final Date myDate;%0A    %0A    public HasDateField(Date date) %7B%0A        this.myDate = new Date(date.getTime());%0A    %7D%0A    %0A    public Date getDate() %7B%0A        return new Date(myDate.getTime());%0A    %7D%0A%7D

Add missing benchmark file used in javadoc of MutabilityAssert.