Checks that the GL_APPLE_sync extension is available.
This command is an alias for glClientWaitSync.
This command is an alias for glDeleteSync.
This command is an alias for glFenceSync.
This command is an alias for glGetInteger64v.
This command is an alias for glGetSynciv.
This command is an alias for glIsSync.
This command is an alias for glWaitSync.