pub trait PrintOperationPreviewImplExt: ObjectSubclass {
// Required methods
fn parent_ready(&self, context: &PrintContext);
fn parent_got_page_size(
&self,
context: &PrintContext,
page_setup: &PageSetup
);
fn parent_render_page(&self, page_nr: i32);
fn parent_is_selected(&self, page_nr: i32) -> bool;
fn parent_end_preview(&self);
}