old_contents: # Copyright (c) 2009, Rotem Yaari <vmalloc@gmail.com>
  # All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are met:
  #     * Redistributions of source code must retain the above copyright
  #       notice, this list of conditions and the following disclaimer.
  #     * Redistributions in binary form must reproduce the above copyright
  #       notice, this list of conditions and the following disclaimer in the
  #       documentation and/or other materials provided with the distribution.
  #     * Neither the name of organization nor the
  #       names of its contributors may be used to endorse or promote products
  #       derived from this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY Rotem Yaari ''AS IS'' AND ANY
  # EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  # DISCLAIMED. IN NO EVENT SHALL Rotem Yaari BE LIABLE FOR ANY
  # DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  from . import exceptions
  
  class RefContainer(object):
      def getBranches(self):
          raise NotImplementedError()
      def getTags(self):
          raise NotImplementedError()
      ########################### Looking for specific refs ##########################
      def _getByName(self, func, name):
          for ref in func():
              if ref.name == name:
                  return ref
          raise exceptions.NonexistentRefException(name)
      def getBranchByName(self, name):
          return self._getByName(self.getBranches, name)
  
new_contents: # Copyright (c) 2009, Rotem Yaari <vmalloc@gmail.com>
  # All rights reserved.
  #
  # Redistribution and use in source and binary forms, with or without
  # modification, are permitted provided that the following conditions are met:
  #     * Redistributions of source code must retain the above copyright
  #       notice, this list of conditions and the following disclaimer.
  #     * Redistributions in binary form must reproduce the above copyright
  #       notice, this list of conditions and the following disclaimer in the
  #       documentation and/or other materials provided with the distribution.
  #     * Neither the name of organization nor the
  #       names of its contributors may be used to endorse or promote products
  #       derived from this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY Rotem Yaari ''AS IS'' AND ANY
  # EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  # DISCLAIMED. IN NO EVENT SHALL Rotem Yaari BE LIABLE FOR ANY
  # DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  from . import exceptions
  
  class RefContainer(object):
      def getBranches(self):
          raise NotImplementedError()
      def getTags(self):
          raise NotImplementedError()
      ########################### Looking for specific refs ##########################
      def _getByName(self, func, name):
          for ref in func():
              if ref.name == name:
                  return ref
          raise exceptions.NonexistentRefException(name)
      def getBranchByName(self, name):
          return self._getByName(self.getBranches, name)
      def hasBranch(self, name):
          try:
              self.getBranchByName(name)
              return True
          except exceptions.NonexistentRefException:
              return False
  
subject: add RefContainer.hasBranch