public Boolean build() {
        return Boolean.valueOf(isEquals());
    }
<p>Returns <code>true</code> if the fields that have been checked
are all equal.</p>

@return <code>true</code> if all of the fields that have been checked
        are equal, <code>false</code> otherwise.

@since 3.0
android/android_framework/base/src/main/java/lang3/builder/EqualsBuilder.java