Validates and possibly reloads the browser columns visible in the panel by invoking the delegate method panel:shouldShowFilename:.
Original signature is '- (void)validateVisibleColumns'
Available in Mac OS X v10.0 and later.

C# | Visual Basic | Visual C++ |
public virtual void ValidateVisibleColumns()
Public Overridable Sub ValidateVisibleColumns
public: virtual void ValidateVisibleColumns()

- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)