how to move a file from tab1 to floating tab1 by api

[SamC]

Hello，
We can use file_open to open file in certain file in certain tab. After file is open, how to move it between tabs？ I didn't fine the method in api.
Thanks!

file_open(filename, group=-1, options="")
file_open((filename1, filename2), group=-1, options="")

[main Alexey]

* PROP_INDEX_GROUP: int: index of group with editor's tab, 0-based. Value 0...5: 6 fixed groups, value 6...8: 3 floating groups.

ed.set_prop(PROP_INDEX_GROUP, 6) - move file to floating-1 group.

[SamC]

Get it，thanks~