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# ->initialize()
 -  sets the culture to  by default
 -  sets the culture to the value of default_culture if available
 -  reads the culture from the session data if available
 -  serializes the culture to the session data
# ->setCulture() ->getCulture()
 -  changes the current user culture
# ->setFlash() ->getFlash() ->hasFlash()
 -  sets a flash variable
 -  returns true if the flash variable exists
 -  returns a flash previously set
 -  returns true if the flash variable exists
 - Flashes are automatically removed after the next request
 -  returns true if the flash variable exists
# Array access for user attributes
 -  returns true if user attribute exists
 -  returns false if user attribute does not exist
 -  returns false if attribute does not exist
 -  returns attribute by name
 -  sets attribute by name
 -  unsets attribute by name
# Attribute holder proxy
 -  returns a parameter holder instance
 -  returns false if the attribute does not exist
 -  returns the default value if attribute does not exist
 -  returns true if the attribute exists
 -  is a proxy method
 -  returns the value of the attribute
 -  is a proxy method
 -  does not return the default value if the attribute exists
 -  takes a namespace as its second parameter
 -  takes a namespace as its second parameter
 -  takes a namespace as its third parameter
 -  is a proxy method
 -  is a proxy method
# New methods via sfEventDispatcher
 -  accepts new methods via sfEventDispatcher
 -  throws an exception if the method does not exist as a sfEventDispatcher listener
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