qualified:name: foo=1 bar=2
 key  16:19                  ^-^          foo
 num  20:21                      ^        1
 val  20:21                      ^        1
pair  16:21                  ^---^        foo=1
 key  22:25                        ^-^    bar
 num  26:27                            ^  2
 val  26:27                            ^  2
pair  22:27                        ^---^  bar=2