    # File lib/RMagick.rb, line 377
         def interline_spacing(space)
             begin
                 Float(space)
             rescue ArgumentError
                 Kernel.raise ArgumentError, "invalid value for interline_spacing"
             rescue TypeError
                 Kernel.raise TypeError, "can't convert #{space.class} into Float"
             end
             primitive "interline-spacing #{space}"
         end