<< (PDF::Writer::Object::Pages)

        # File lib/pdf/writer/object/pages.rb, line 36
    36:   def <<(p)
    37:     if p.kind_of?(PDF::Writer::Object::Page)
    38:       @pages << p
    39:     elsif p.kind_of?(PDF::Writer::Object::Font)
    40:       @fonts << p
    41:     elsif p.kind_of?(PDF::Writer::External)
    42:       @xObjects << p
    43:     else
    44:       raise ArgumentError, PDF::Message[:req_FPXO]
    45:     end
    46:   end