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