code: def yank_fields_from_attrs(attrs, _as=None, sort=True):
      
      fields_with_names = []
      for attname, value in list(attrs.items()):
          field = get_field_as(value, _as)
          if not field:
              continue
          fields_with_names.append((attname, field))
  
      if sort:
          fields_with_names = sorted(fields_with_names, key=lambda f: f[1])
      return OrderedDict(fields_with_names)
docs: Extract all the fields in given attributes (dict)
      and return them ordered