Binary package “libgtkdsv-3-dev” in ubuntu focal
GTK+ syntax highlighting widget - development files for D
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 development files needed to write applications in
the D programming language that use GtkSourceView.