How to keep one blank line after function, for, while, with, and similar headers.

It seems that where formatter expects a documentation comment, like after function, for, while with, and similar, it refuses to keep the blank line after it and just removes blank line immediately after the header even when the statement immediately after the header is not a documentation comment. I don't like this and cannot find anything in the settings that can help. How can I force the formatter to keep one blank line immediately after function declaration and for while headers?