Adds a string to be displayed in --help output before the list of options. This is typically a summary of the program functionality.
Note that the summary is translated (see OptionContext.setTranslateFunc and OptionContext.setTranslationDomain).
a string to be shown in --help output before the list of options, or NULL
2.12
Adds a string to be displayed in --help output before the list of options. This is typically a summary of the program functionality.
Note that the summary is translated (see OptionContext.setTranslateFunc and OptionContext.setTranslationDomain).