class ActiveAdmin::Views::Column

def set_column_styles(column_width, margin_width, is_last_column = false)
  column_with_span_width = (span_size * column_width) + ((span_size - 1) * margin_width)
  styles = []
  styles << "width: #{column_with_span_width}%;"
  if max_width
    styles << "max-width: #{safe_width(max_width)};"
  end
  if min_width
    styles << "min-width: #{safe_width(min_width)};"
  end
  styles << "margin-right: #{margin_width}%;" unless is_last_column
  set_attribute :style, styles.join(" ")
end