whole_func_string: function(abbr, syntax) {
  			var snippet = this.expand(abbr, null, syntax);
  			if (_.isArray(snippet)) {
  				return snippet.join('\n');
  			}
  			
  			if (!_.isString(snippet))
  				return snippet.data;
  			
  			return String(snippet);
  		}
func_code_string: function(abbr, syntax) {
  			var snippet = this.expand(abbr, null, syntax);
  			if (_.isArray(snippet)) {
  				return snippet.join('\n');
  			}
  			
  			if (!_.isString(snippet))
  				return snippet.data;
  			
  			return String(snippet);
  		}
func_documentation_string: Same as <code>expand</code> method but transforms output into
  Emmet snippet
  @param {String} abbr
  @param {String} syntax
  @returns {String}