def _tree_create_leaf(self, name, trajectory, hdf5_group):
class_name = self._all_get_from_attrs(hdf5_group, HDF5StorageService.CLASS_NAME)<EOL>class_constructor = trajectory._create_class(class_name)<EOL>instance = trajectory._construct_instance(class_constructor, name)<EOL>return instance<EOL>
Creates a new pypet leaf instance.

        Returns the leaf and if it is an explored parameter the length of the range.