code: def parse_instance_requirement(self, node):
          
  
          if 'name' in node.lattrib:
              name = node.lattrib['name']
          else:
              self.raise_error('<InstanceRequirement> must specify a name')
  
          if 'type' in node.lattrib:
              type = node.lattrib['type']
          else:
              self.raise_error("InstanceRequirement \{0}' must specify a type.", name)
  
          self.current_component_type.add_instance_requirement(InstanceRequirement(name, type))
docs: Parses <InstanceRequirement>
  
          @param node: Node containing the <InstanceRequirement> element
          @type node: xml.etree.Element