> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 0.8.11 **`(fix):`** Corrects the fix in 0.8.10 to check null value as opposed to a .isPresent check, given the header is not `Optional`, it's always `String` ## 0.8.10 **`(fix):`** Fixes regression from 0.8.8, headers are no longer added to the header map unless they are non-null.