protected void setFieldSeparatorAtEnd(boolean fieldSeparatorAtEnd) {
        this.fieldSeparatorAtEnd = fieldSeparatorAtEnd;
    }
<p>Sets whether the field separator should be added at the end
of each buffer.</p>

@param fieldSeparatorAtEnd  the fieldSeparatorAtEnd flag
@since 2.0
android/android_framework/base/src/main/java/lang3/builder/ToStringStyle.java