How to add custom size for only first column & all other columns another size

[talaatmagdyx]

Environment

• node -v: v8.10.0
• npm -v: 3.5.2
• npm ls officegen: 0.4.5
• Operating system: ubuntu
• Problem with Powerpoint, Excel or Word document: Powerpoint

I need add custom size for only first column & all other columns another size
my try

• columnWidths: [3186250,1000000] or columnWidths: [3186250, [1000000]]
  this occur error if column number > 2
  missing attribute value for attribute w of element : a gridcol

[talaatmagdyx]

i solve this problem with small method calculate width & make first index in array static size