** Sass CSS output style.** ** See [Sass Output Style]`http://sass-lang.com/documentation/file.SASS_REFERENCE.html#output_style` for details.enum class SassOutputStyle {** Nested style is the default Sass style, because it reflects the structure of the CSS styles and the HTML** document they’re styling. Each property has its own line, but the indentation isn’t constant.** Each rule is indented based on how deeply it’s nested. nested,** Expanded is a more typical human-made CSS style, with each property and rule taking up one line.** Properties are indented within the rules, but the rules aren’t indented in any special way. expanded,** Compact style takes up less space than Nested or Expanded.** It also draws the focus more to the selectors than to their properties.** Each CSS rule takes up only one line, with every property defined on that line.** Nested rules are placed next to each other with no newline, while separate groups of rules have** newlines between them. compact,** Compressed style takes up the minimum amount of space possible, having no whitespace except that necessary to** separate selectors and a newline at the end of the file. It also includes some other minor compressions, such as** choosing the smallest representation for colors. It’s not meant to be human-readable. compressed;}