return a tuple of strings containing the body of a method.
        msgInName -- None or a str
        msgOutName --  None or a str

def createMethodBody(msgInName, msgOutName, **kw):
        '''return a tuple of strings containing the body of a method.
        msgInName -- None or a str
        msgOutName --  None or a str
        '''
        body = []
        if msgInName is not None:
            body.append('request = ps.Parse(%s.typecode)' %msgInName)
            
        if msgOutName is not None:
            body.append('return request,%s()' %msgOutName)
        else: 
            body.append('return request,None')
            
        return tuple(body)