new_contents: """
  author:     Joel McCune (joel.mccune+aw@gmail.com)
  dob:        04 Dec 2014
  purpose:    Provide a tool wrapper for extracting and saving reach hydrolines.
  
      Copyright 2014 Joel McCune
  
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
      You may obtain a copy of the License at
  
         http://www.apache.org/licenses/LICENSE-2.0
  
      Unless required by applicable law or agreed to in writing, software
      distributed under the License is distributed on an "AS IS" BASIS,
      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      See the License for the specific language governing permissions and
      limitations under the License.
  """
  # import modules
  import arcpy
  import reach_utlities
  
  # provide a more intersting message
  arcpy.SetProgressor(type='default', message='firing up the redonkulator...stand by')
  
  # collect input parameters and run functions
  reach_utlities.get_reach_line_fc(
      access_fc=arcpy.GetParameter(0),
      huc4_fc=arcpy.GetParameter(1),
      hydro_network=arcpy.GetParameter(2),
      output_hydroline_fc=arcpy.GetParameterAsText(3),
      output_invalid_reach_table=arcpy.GetParameterAsText(4)
  )
subject: add method to get and process data from a selection for subregion