Adds a style provider to @context, to be used in style construction.
Note that a style provider added by this function only affects
the style of the widget to which @context belongs. If you want
to affect the style of all widgets, use
[func@Gtk.StyleContext.add_provider_for_display].
Note: If both priorities are the same, a GtkStyleProvider
added through this function takes precedence over another added
through [func@Gtk.StyleContext.add_provider_for_display].
the priority of the style provider. The lower
it is, the earlier it will be used in the style construction.
Typically this will be in the range between
%GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and
%GTK_STYLE_PROVIDER_PRIORITY_USER
Adds a style provider to @context, to be used in style construction.
Note that a style provider added by this function only affects the style of the widget to which @context belongs. If you want to affect the style of all widgets, use [func@Gtk.StyleContext.add_provider_for_display].
Note: If both priorities are the same, a GtkStyleProvider added through this function takes precedence over another added through [func@Gtk.StyleContext.add_provider_for_display].