def stack
      @stack ||= reader.execute(
        name: stack_name,
        parent_name: self.respond_to?(:parent_name) ? self.parent_name : nil,
        values: (self.respond_to?(:values_from_options) ? self.values_from_options : {})
      )
    end
def stack
      @stack ||= reader.execute(
        name: stack_name,
        parent_name: self.respond_to?(:parent_name) ? self.parent_name : nil,
        values: (self.respond_to?(:values_from_options) ? self.values_from_options : {})
      )
    end
An accessor to the YAML Reader outcome. Passes parent name, values from command line and
 the stackname to the reader.

 @return [Hash]