# File lib/sass/tree/if_node.rb, line 42
    def to_src(tabs, opts, fmt, is_else = false)
      name =
        if !is_else; "if"
        elsif @expr; "else if"
        else; "else"
        end
      str = "#{'  ' * tabs}@#{name}"
      str << " #{@expr.to_sass(opts)}" if @expr
      str << children_to_src(tabs, opts, fmt)
      str << @else.send(:to_src, tabs, opts, fmt, true) if @else
      str
    end