def materials(self):
        """
        Property for accessing :class:`MaterialManager` instance, which is used to manage materials.

        :rtype: yagocd.resources.material.MaterialManager
        """
        if self._material_manager is None:
            self._material_manager = MaterialManager(session=self._session)
        return self._material_manager
def materials ( self ) : if self . _material_manager is None : self . _material_manager = MaterialManager ( session = self . _session ) return self . _material_manager
Property for accessing :class:`MaterialManager` instance, which is used to manage materials.

        :rtype: yagocd.resources.material.MaterialManager