class_docstr: This class can be used to fetch NuPic configuration settings which are
  stored in one or more XML files.
  
  If the environment variable ``NTA_CONF_PATH`` is defined, then the
  configuration files are expected to be in the ``NTA_CONF_PATH`` search path,
  which is a ':' separated list of directories (on Windows the separator is a
  ';'). If ``NTA_CONF_PATH`` is not defined, then it is loaded via
  pkg_resources.
docstr: Clear out the entire configuration.
      
docstr_tok: ["Clear","out","the","entire","configuration","."]
code: def clear(cls):
      """Clear out the entire configuration."""
  
      cls._properties = None
      cls._configPaths = None
  
imports: from __future__ import with_statement
  import os
  import logging
  from xml.etree import ElementTree
  from pkg_resources import resource_string
label_desc: Use image node_id 10 for calling the Configuration obj's underlying member method code with example usage: obj.clear(cls) without return types