def find_cells_by_background_color color=:any, options={}
      options = {:hash_keys=>true}.merge(options)
      cells = self.collect {|c| c if c.format.has_background_color?(color) }.compact
      r = Row.new cells
      options[:hash_keys] ? r.to_symbols : r
    end
def find_cells_by_background_color color=:any, options={}
      options = {:hash_keys=>true}.merge(options)
      cells = self.collect {|c| c if c.format.has_background_color?(color) }.compact
      r = Row.new cells
      options[:hash_keys] ? r.to_symbols : r
    end
Returns an array of cells allows you to find cells by a given color, normally a string containing a hex

 @param [String] color  a CSS-style hex-string
 @param [Hash] options Option :hash_keys (default true) returns row as an array of symbols
 @return [Array<Symbol>, Workbook::Row<Workbook::Cell>]