AssetDatabase.SetMainObject

public static void SetMainObject(Object mainObject, string assetPath);

Parameters

mainObject		The object to become the main object.
assetPath		Path to the asset file.

Description 描述

Specifies which object in the asset file should become the main object after the next import.

All other objects in the asset become children of the main object. NOTE: This function modifies the importer object, not the asset itself. The next import reflects the change in the imported asset.