ruby - Prawn PDF: render a set of things on the same page -

i looking way following

pdf.on_same_page    pdf.text "foo"    pdf.imaage bar    pdf.table(baz)    .... end 

in other words, wanting group several elements such if entire group can fit on page, render on same page, otherwise page break , render on next page (assuming entire group can fit on single page) how such thing accomplished?