Set a specific column order in Pheatmap

Question

I'm having some troubles by trying to set a specific column order for a heatmap with the Pheatmap package.

Actually I got mydata to be plot and I'm trying to set my_col as order for the columns:

my_col <- list("AL703GG", "AO641M", "CL374FF", "AO643DD", "CO438LL", "CE480L", "AE608H", "SM11", "AK83", "NGR", "AK58", "AK75", "BL225C", "CO431A", "H1", "AL703H", "1A42", "8A52", "T073", "4B41", "7B22")

pheatmap(mydata2,
         display_numbers = FALSE,
         annotation_row = my_rows,
         cluster_rows = F)

How can I do that? Thanks in advance!