Lenya 2.0 passing form request parameters to usecase

Hello,

   I have usecase editors.insertImage that after image selection gets back
to my implemented usecase ginactions.edit :

<xconf xpath="/cocoon/usecases"
unless="/cocoon/usecases/component-instance[@name = 'ginactions.edit']">
  <component-instance name="ginactions.edit"
                      logger="lenya.site.ginactions"

class="com.ginsoftware.lenya.cms.ginactions.ActionsEdit">
    <view
       uri="modules/ginactions/usecases/dynamicrepeater_template.xml"
       customFlow="fallback://lenya/modules/ginactions/flow/customFlow.js"
    />
    <event id="edit"/>
  </component-instance>
</xconf>

where

package com.ginsoftware.lenya.cms.ginactions;
...
public class ActionsEdit extends InvokeWorkflow{
 ...
}

In other words, I open my usecase ginactions.edit, click on link "Insert
image" , go to usecase editors.insertImage, select image and go back to
ginactions.edit with image request parameters from editors.insertImage POST
form.

How can I get those selected image parameters values with
this.getParameterAsString("...") in ActionsEdit.java ?

Thanks,
Gintarė