14       className: 'chunk',  property
19       className: 'chunk',  property
24       className: 'chunk',  property
29       className: 'header',  property
33       className: 'header',  property
37       className: 'header',  property
41       className: 'header',  property
45       className: 'header',  property
49       className: 'header',  property
53       className: 'addition',  property
57       className: 'deletion',  property
61       className: 'change',  property