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# ->getInstance()
 -  returns an object with  as the default culture
 -  takes a culture as its first argument
 -  returns an object with  as the default culture
# __toString()
 -  returns the name of the culture
 -  throws an exception if the culture is not valid
# ->getLanguage()
 -  returns the language name for the current culture
 -  returns the language name for the current culture
 -  throws an Exception if the given language is invalid.
# ->getCurrency()
 -  returns the currency name for the current culture
 -  returns the currency name for the current culture
 -  throws an Exception if the given currency is invalid.
# ->getCountry()
 -  returns the country name for the current culture
 -  returns the country name for the current culture
 -  throws an Exception if the given country is invalid.
# ->getLanguages()
 -  returns a list of languages in the language of the localized version
 -  returns a list of languages in the language of the localized version
 -  is equivalent to ->Languages
 -  takes an array of languages as its first argument
 -  throws an Exception if the list of given languages contains some invalid ones.
# ->getCurrencies()
 -  returns a list of currencies in the language of the localized version
 -  returns a list of currencies in the language of the localized version
 -  is equivalent to ->Currencies
 -  takes an array of currencies as its first argument
 -  throws an Exception if the list of given currencies contains some invalid ones.
# ->getCountries()
 -  returns a list of countries in the language of the localized version
 -  returns a list of countries in the language of the localized version
 -  is equivalent to ->Countries
 -  takes an array of countries as its first argument
 -  throws an Exception if the list of given countries contains some invalid ones.
# ->getScripts()
 -  returns a list of scripts in the language of the localized version
 -  returns a list of scripts in the language of the localized version
 -  is equivalent to ->Scripts
# ->getTimeZones()
 -  returns a list of time zones in the language of the localized version
 -  returns a list of time zones in the language of the localized version
 -  is equivalent to ->TimeZones
# ->validCulture()
 -  returns true if the culture is valid
 -  returns true if the culture is valid
 -  returns false if the culture does not exist
 -  returns false if the culture does not exist
 -  returns false if the culture does not exist
# ::getCultures()
 -  returns an array of all available cultures
 -  returns an array of all available cultures
 -  returns an array of all available cultures
 -  returns an array of all available cultures
 -  returns an array of all available cultures
 -  returns an array of all available cultures
# ->getParent()
 -  returns a sfCultureInfo instance
 -  returns the parent culture
 -  returns the invariant culture if the culture is neutral
# ->getIsNeutralCulture()
 -  returns false if the culture is specific
 -  returns true if the culture is neutral
# ->getEnglishName()
 -  returns the english name of the current culture
 -  returns the english name of the current culture
 -  is equivalent to ->EnglishName
# ->getNativeName()
 -  returns the native name of the current culture
 -  returns the native name of the current culture
 -  is equivalent to ->NativeName
# ->getCalendar()
 -  returns the default calendar
 -  is equivalent to ->Calendar
# __get()
 -  throws an exception if the property does not exist
# __set()
 -  throws an exception if the property does not exist
# ->getDateTimeFormat()
 -  returns a sfDateTimeFormatInfo instance
# ->setDateTimeFormat()
 -  sets the sfDateTimeFormatInfo instance
 -  is equivalent to ->DateTimeFormat = 
# ->getNumberFormat()
 -  returns a sfNumberFormatInfo instance
# ->setNumberFormat()
 -  sets the sfNumberFormatInfo instance
 -  is equivalent to ->NumberFormat = 
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