docs: protected void _format(SarlCapacity capacity, IFormattableDocument document) {
  		formatAnnotations(capacity, document, XbaseFormatterPreferenceKeys.newLineAfterClassAnnotations);
  		formatModifiers(capacity, document);
  
  		final ISemanticRegionsFinder regionFor = this.textRegionExtensions.regionFor(capacity);
  
  		document.append(regionFor.keyword(this.keywords.getCapacityKeyword()), ONE_SPACE);
  
  		document.surround(regionFor.keyword(this.keywords.getExtendsKeyword()), ONE_SPACE);
  		formatCommaSeparatedList(capacity.getExtends(), document);
  
  		formatBody(capacity, document);
  	}