parameters: (self, properties)
return_statement: return self.add (create (properties))
docstring: Creates a new property set containing the properties in this one,
              plus the ones passed as argument.
docstring_summary: Creates a new property set containing the properties in this one,
              plus the ones passed as argument.
docstring_tokens: Creates a new property set containing the properties in this one plus the ones passed as argument .
function: def add_raw (self, properties):
          """ Creates a new property set containing the properties in this one,
              plus the ones passed as argument.
          """
          return self.add (create (properties))
function_tokens: def add_raw ( self , properties ) : return self . add ( create ( properties ) )