Column width issue

My requirement is, How to give a width to nested headers,

Issue with Nested Headers and HOT Table - JSFiddle - Code Playground
In this link header value is static, In my case header value is dynamic, some time value length is small or large. In that case width of the column should not be changed it should be fixed,
My be the header value is 100 or 200 character, it’s width should not be alter.
see the below example…
colWidths: [15, 15, 90, 90, 90, 90, 90, 90, 90, 90],

Hear we are giving first column width is 15, In nested header
nestedHeaders: [
[‘A’, {
label: ‘B’,
colspan: 8
}, ‘C’],
[‘LONGER LABELrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr’, ‘O’, ‘LONGER LABEL DOES NOT RESIZE’, ‘Q’, ‘LONGER LABEL DOES NOT RESIZE’, ‘S’, ‘LONGER LABEL DOES NOT RESIZE’, ‘U’, ‘V’, ‘W’]
],

Here first column value is more then 15 characters,
My question is, we can pass any length of value, that column width should not be increased, it’ll may increase cell height no problem.