[SR-Users] escape firt two lines from get_body_part to get xml only part

hello everyone, i am trying to parse the xml from the message body: get_body_part("application/pidf+xml", "$var(pbody)"); and i am getting the following in my pbody var: Content-Disposition: render;handling=optionalContent-ID: <sip:+6478897789@ims.mnc0xx.mccxxx.3gppnetwork.org><?xml version="1.0"?><presence xmlns:dm="urn:ietf:params:xml:ns:pidf:data-model" xmlns:gp="urn:ietf:params:xml:ns:pidf:geopriv10" xmlns:gml="http://www.opengis.net/gml" xmlns:gs="http://www.opengis.net/pidflo/1.0" xmlns:con="urn:ietf:params:xml:ns:geopriv:conf" entity="sip:+6478897789@ims.mnc0xx.mccxxx.3gppnetwork.org"><dm:device id="Wifi"><gp:geopriv><gp:location-info><gs:Circle srsName="urn:ogc:def:crs:EPSG::5524"><gml:pos>31.204359 -44.512358</gml:pos><gs:radius uom="urn:ogc:def:uom:EPSG::8190">10.578000</gs:radius></gs:Circle><con:confidence pdf="normal">92</con:confidence></gp:location-info><gp:method>DBH_HELO</gp:method><gp:usage-rules/></gp:geopriv><dm:timestamp>2022-04-05T19:16:34Z</dm:timestamp></dm:device></presence>  how can i escape the first two lines in order to get the xml part of the content? thanks in advance,Art