docs: def resolve_xref(self, env, fromdocname, builder,
                       typ, target, node, contnode):
          # type: (BuildEnvironment, unicode, Builder, unicode, unicode, nodes.Node, nodes.Node) -> nodes.Node  # NOQA
          """Resolve the pending_xref *node* with the given *typ* and *target*.
  
          This method should return a new node, to replace the xref node,
          containing the *contnode* which is the markup content of the
          cross-reference.
  
          If no resolution can be found, None can be returned; the xref node will
          then given to the :event:`missing-reference` event, and if that yields no
          resolution, replaced by *contnode*.
  
          The method can also raise :exc:`sphinx.environment.NoUri` to suppress
          the :event:`missing-reference` event being emitted.
          """
          for fullname, (docname, objtype) in self.data['objects'].items():
              if fullname.name == target:
                  return make_refnode(builder, fromdocname, docname, fullname2id(fullname), contnode, fullname.name)
          return None