added functions for internal use.
added functions for internal use.

hks2002/treefrog-framework,AmiArt/treefrog-framework,AmiArt/treefrog-framework,froglogic/treefrog-framework,treefrogframework/treefrog-framework,skipbit/treefrog-framework,AmiArt/treefrog-framework,hks2002/treefrog-framework,treefrogframework/treefrog-framework,treefrogframework/treefrog-framework,treefrogframework/treefrog-framework,AmiArt/treefrog-framework,skipbit/treefrog-framework,hks2002/treefrog-framework,skipbit/treefrog-framework,hks2002/treefrog-framework,froglogic/treefrog-framework,hks2002/treefrog-framework,froglogic/treefrog-framework,skipbit/treefrog-framework,froglogic/treefrog-framework,skipbit/treefrog-framework,AmiArt/treefrog-framework,treefrogframework/treefrog-framework,froglogic/treefrog-framework