text: r"""
  
  **openpnm.materials**
  
  ----
  
  This module provides a library of preconfigured Network-Geometry combinations.
  
  In most case the topology and geometry cannot be considered in isolation.
  This module provides recipes that create both the Network and Geometry objects
  simultaneously to ensure sensible correspondance between things like lattice
  spacing and pore sizes.  Some of the classes in this module have a signficant
  amount of custom code (e.g. ``VoronoiFibers``), while others are simple
  recipes that combine existing models in OpenPNM (e.g. ``BereaCubic``).
  
  
  The table below gives a list of available Material generators:
  
  +---------------------+-------------------------------------------------------+
  | Material Name       | Description                                           |
  +=====================+=======================================================+
  | VoronoiFibers       | Resembles a fibrous paper or mat with straight        |
  |                     | intersecting fibers.                                  |
  +---------------------+-------------------------------------------------------+
  
  """
  
  from .VoronoiFibers import VoronoiFibers
  from .BundleOfTubes import BundleOfTubes
  