This link modifier is created as soon as a variable is exposed ans an 
                    Exposed Parameter
                    Allow to control multiple Link Target with a single value
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                    .
                          This modifier allow to create a 
                    Keyframe Function
                    Define a function using keyframes
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                     on a 
                    Link Target
                    Represent a link or parameter. Point toward an element parameter. "right click -> Goto" on the target to go to that element
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                     and is then configurable through the 
                    Function Editor
                    The editor allows you to manipulate every Function in Smode
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                    .
      
