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Public Member Functions
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  | __get ($var)
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  | __isset ($var)
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  | __construct ($res=null)
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  | hasValue ()
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  | getNoValueMessage ()
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  | getValue ()
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  | __set ($var, $value)
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  | __get ($var)
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  | __isset ($var)
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  | __construct ($res=null)
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  | hasValue ()
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  | getNoValueMessage ()
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  | getValue ()
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  | __set ($var, $value)
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  | __get ($var)
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  | __isset ($var)
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  | __construct ($res=null)
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  | hasValue ()
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  | getNoValueMessage ()
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  | getValue ()
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  | __set ($var, $value)
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  | __get ($var)
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  | __isset ($var)
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| 
  | __construct ($res=null)
 | 
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  | hasValue ()
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  | getNoValueMessage ()
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  | getValue ()
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