protected void setContentEnd(String contentEnd) {
        if (contentEnd == null) {
            contentEnd = "";
        }
        this.contentEnd = contentEnd;
    }
<p>Sets the content end text.</p>

<p><code>null</code> is accepted, but will be converted to
an empty String.</p>

@param contentEnd  the new content end text
android/android_framework/base/src/main/java/lang3/builder/ToStringStyle.java