Binary package “libgtksourceview-4-dev” in ubuntu focal

development files for the GTK+ syntax highlighting widget

 GtkSourceView is a text widget that extends the standard GTK+ 3.x text widget
 GtkTextView. It improves GtkTextView by implementing syntax highlighting and
 other features typical of a source editor.
 This package contains the header files required if you wish to develop
 software that uses the GtkSourceView widget.