IFC Export by API how to set options?

[RubenG]

Can someone tell me how I can put the IFC export options if I (through the API (Ruby) wants to export a model.export file as .ifc?
In the documentation of the API there is nothing about it, but at a manual export ' for example, I can specify which ifc export elements should be exported.
I want to export an IFC ifc elements with just only the ' Ifc_Window ' elements....