__init__(self,
        name=None,
        default=None,
        parent=None,
        sizer=None,
        desc=None,
        message='File selection',
        wildcard=u'*',
        style=1,
        tooltip=None,
        divider=None,
        padding=0,
        spacer=None,
        height_element=27,
        preview=True,
        read_only=False)
     (Constructor)
  
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  Build the file selection element. 
  
    - Parameters:
 
    
        name (str) - The name of the element to use in titles, etc. 
        default (str) - The default value of the element. 
        parent (wx.Panel instance) - The wizard GUI element. 
        sizer (wx.Sizer instance) - The sizer to put the input field into. 
        desc (str) - The text description. 
        message (String) - The file selector prompt string. 
        wildcard (String) - The file wildcard pattern.  For example for opening PDB files, 
          this could be "PDB files (*.pdb)|*.pdb;*.PDB". 
        style (long) - The dialog style.  To open a single file, set to wx.FD_OPEN.  To 
          open multiple files, set to wx.FD_OPEN|wx.FD_MULTIPLE.  To save a
          single file, set to wx.FD_SAVE.  To save multiple files, set to 
          wx.FD_SAVE|wx.FD_MULTIPLE. 
        tooltip (str) - The tooltip which appears on hovering over all the GUI elements. 
        divider (int) - The position of the divider. 
        padding (int) - Spacing to the left and right of the widgets. 
        spacer (None or int) - The amount of spacing to add below the field in pixels.  If None,
          a stretchable spacer will be used. 
        height_element (int) - The height in pixels of the GUI element. 
        preview (bool) - A flag which if true will allow the file to be previewed. 
        read_only (bool) - A flag which if True means that the text of the element cannot be
          edited. 
      
   
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