def get_source(self):
     '''
     Returns source string from a ttkit unit.
     '''
     if (isinstance(self.mainunit, tsunit) and
             self.template is None and
             self.mainunit.hasplural()):
         # Need to apply special magic for plurals here
         # as there is no singlular/plural in the source string
         return join_plural([
             self.unit.source,
             self.unit.source,
         ])
     if self.is_unit_key_value():
         # Need to decode property encoded string
         if isinstance(self.mainunit, propunit):
             if self.template is not None:
                 return quote.propertiesdecode(self.template.value)
             else:
                 return quote.propertiesdecode(self.unit.name)
         if self.template is not None:
             return self.template.value
         else:
             return self.unit.name
     else:
         if self.template is not None:
             return get_string(self.template.target)
         else:
             return get_string(self.unit.source)

 def get_source(self):
     """Return source string from a ttkit unit."""
     if self.is_unit_key_value(self.mainunit):
         # Need to decode property encoded string
         if isinstance(self.mainunit, propunit):
             if self.template is not None:
                 return quote.propertiesdecode(self.template.value)
             return quote.propertiesdecode(self.unit.name)
         if self.template is not None:
             return self.template.value
         return self.unit.name
     else:
         if self.template is not None:
             return get_string(self.template.target)
         return get_string(self.unit.source)

 def get_previous_source(self):
     '''
     Returns previous message source if there was any.
     '''
     if not self.is_fuzzy() or not hasattr(self.unit, 'prev_source'):
         return ''
     return get_string(self.unit.prev_source)

 def get_previous_source(self):
     """
     Returns previous message source if there was any.
     """
     if not self.is_fuzzy() or not hasattr(self.unit, "prev_source"):
         return ""
     return get_string(self.unit.prev_source)

 def get_target(self):
     """Return target string from a ttkit unit."""
     if self.unit is None:
         return ''
     if self.is_unit_key_value(self.unit):
         # Need to decode property encoded string
         if isinstance(self.unit, propunit):
             # This is basically stolen from
             # translate.storage.properties.propunit.gettarget
             # which for some reason does not return translation
             value = quote.propertiesdecode(self.unit.value)
             value = re.sub('\\\\ ', ' ', value)
             return value
         return self.unit.value
     return get_string(self.unit.target)

 def get_target(self):
     """
     Returns target string from a ttkit unit.
     """
     if self.unit is None:
         return ""
     if isinstance(self.unit, tsunit) and not self.unit.isreview() and not self.unit.istranslated():
         # For Qt ts, empty translated string means source should be used
         return self.get_source()
     if self.is_unit_key_value():
         # Need to decode property encoded string
         if isinstance(self.unit, propunit):
             # This is basically stolen from
             # translate.storage.properties.propunit.gettarget
             # which for some reason does not return translation
             value = quote.propertiesdecode(self.unit.value)
             value = re.sub(u"\\\\ ", u" ", value)
             return value
         return self.unit.value
     else:
         return get_string(self.unit.target)

 def get_source(self):
     # Needed to avoid translate-toolkit construct ID
     # as context\04source
     if self.template is None:
         return get_string(self.mainunit.source)
     return super(CSVUnit, self).get_source()

 def target(self):
     """Return target string from a ttkit unit."""
     if self.unit is None:
         return ''
     return get_string(self.unit.target)

 def source(self):
     """Return source string from a ttkit unit."""
     if self.template is not None:
         return get_string(self.template.target)
     return get_string(self.unit.source)

 def previous_source(self):
     """Return previous message source if there was any."""
     if not self.is_fuzzy():
         return ''
     return get_string(self.unit.prev_source)