module ActionView::Layouts::ClassMethods

* :except - Apply this layout to all actions but this one.
* :only - A list of actions to apply this layout to.
==== Options (conditions)

* layout - The layout to use.
==== Parameters

nil:: Force default layout behavior with inheritance
true:: raise an ArgumentError
false:: There is no layout
Symbol:: call the method specified by the symbol, which will return the template name
String:: the String is the template name
If the specified layout is a:

Specify the layout to use for this class.

def layout(layout, conditions = {})
  include LayoutConditions unless conditions.empty?
  conditions.each {|k, v| conditions[k] = Array(v).map {|a| a.to_s} }
  self._layout_conditions = conditions
  self._layout = layout
  _write_layout_method
end