Optional collection component requires a test-method , but it is ignored if specified

<?xml version="1.0" encoding="UTF-8"?>
<binding forwards="false" value-style="attribute">
<mapping class="PropertyInteger" name="property-integer">
<value style="attribute" name="name" field="m_name" usage="required"/>
<value style="attribute" name="value" field="m_value" type="java.lang.Integer" usage="required"/>
<value style="attribute" name="default-value" field="m_defaultValue" type="java.lang.Integer" usage="required"/>
<value style="element" name="comment" field="m_comment" usage="optional"/>
<structure name="range" field="m_range" type="RangeInteger" usage="required">
<collection field="m_values" item-type="RangeItemInteger">
<structure name="range-item" type="RangeItemInteger" usage="optional">
<value style="attribute" name="min" field="m_minValue" type="java.lang.Integer" usage="optional"/>
<value style="attribute" name="max" field="m_maxValue" type="java.lang.Integer" usage="optional"/>
</structure>
<structure name="item" type="RangeItemInteger" post-set="jibx_postSetMax2Min" test-method="isMinEqualToMax" usage="optional">
<value style="attribute" name="val" field="m_minValue" type="java.lang.Integer" usage="optional"/>
</structure>
</collection>
</structure>
</mapping>
</binding>

JiBX binding output :
----------------------------

Using bindings:
binding.xml
Running binding compiler version jibx_1_1
Warning: Property access attributes (field, get-method, set-method, test-method) ignored for collection item; on structure element
at (line 14, col 132, in binding.xml)
Error: Collection component must specify a test-method to distinguish from next component of compatible type for marshalling; on s
tructure element at (line 14, col 132, in binding.xml)
Error running binding compiler
org.jibx.runtime.JiBXException: Binding binding.xml is unusable because of validation errors
at org.jibx.binding.Utility.loadBinding(Utility.java:346)
at org.jibx.binding.Utility.loadFileBinding(Utility.java:413)
at org.jibx.binding.Compile.compile(Compile.java:296)
at org.jibx.binding.Compile.main(Compile.java:385)

Purpose is to have a collection of generic RangeItemInteger instances with two fields m_minValue and m_maxValue and at the same time to be able to specify a XML shortcut for the case when the range is just a single value, i.e. m_minValue equals m_maxValue, instead of having to specify both m_minValue and m_maxValue, e.g. :

...
<range>
<range-item min="0" max="511"/>
<range-item min="1000" max="1500"/>
<range-item max="1500"/>
<range-item min="1777"/>
<range-item min="1778" max="1778"/>
<item val="1779"/>
</range>
...