TYPO3 Core

The debug-function from debugUtility is a very useful tool for developers:
typo3\sysext\core\Classes\Utility\DebugUtility.php

But you will NOT see the header-text you set in the debug() parameters.
For debugging this is a heavy drawback: You are not able to distinguish
the values of the listed variables.

So I would guess it would be a good idea to use the
parameters given to the function for the output?

In the last versions of
typo3 v7.6.x and v8.3.x aprox. line 70

#echo self::renderDump($var);
echo self::renderDump($var, sprintf('%s (%s)', $header, $group));

(The renderDump call is taken from the debugInPopUpWindow-call some line down)