How to set section header is aligned center on table?

[thecuder]

Now, the number of headers depends on the number of columns. Example: I have 4 cols and the number of headers also is 4. I want to make a table where section header is only 1 column and not depend on the number of table's columns.
How can I do this?

[BraisGabin]

Right now it's not possible to do that. You should edit the source code of TableFixHeader to get that behaviour.

[thecuder]

Can you help me to find what part of TableFixHeader source code should be edited?
Thank you!