Is it possible to read description of a request by groovy ?

Hello,

SoapUi pro reads the WSDL and proposes to the end user a form to create request and shows the different parameters.

I would like to use this information, in order to  know:
-  if the sessionID parameter is used in this webservice ?
-  if the sessionID parameter is mandatory in this webservice ?

And also, in order to have an easy way to create dynamicaly a request that I will be send by soapui.

Thanks,
PHL.