code: function() {
  			var context = this.loopContext;
  			var forkContext = this.forkContext;
  			var leftSegments = forkContext.makeDisconnected(-1, -1);
  
  			// Update state.
  			context.prevSegments = forkContext.head;
  			context.leftSegments = context.continueDestSegments = leftSegments;
  			forkContext.replaceHead(leftSegments);
  		}
docs: Makes a code path segment for the left part of a ForInStatement and a
  ForOfStatement.
  
  @returns {void}