I have to add a column after validation from my application. Is there any pre-validation available for adding columns in pre-header for grouping? And is there any method to remove a particular column from a pre-header?
Software versions:
Angular : 7.3.5
Angular-Slickgrid : 2.19.0
TypeScript : 3.1.6
Windows 10
Node : 10.16.3
NPM : 6.9.0