def vm_lines
        output.match(PARSE_LIST_FROM_OUTPUT).tap {|list|
          logger.debug "Parsing VM list from output using #{description}"
          raise InvalidFormat.new "Couldn't find VM list" if list.nil?
        }.captures[0].lines
      end
def vm_lines
        output.match(PARSE_LIST_FROM_OUTPUT).tap {|list|
          logger.debug "Parsing VM list from output using #{description}"
          raise InvalidFormat.new "Couldn't find VM list" if list.nil?
        }.captures[0].lines
      end
Retrieves the virtual machine list section of the output