040000 tree dca748be13cc7c9d1f421d1be2c24f67306abcbb	bubblemerge
040000 tree ea5fb6a50d184cbc07ce7a45bc9f3969afdab34b	pathmerge
040000 tree e813eca02f8453e0797fd559a20c674f1e8396c4	synthetic
040000 tree 1743fe661026cf1b89cd520f758c613f5b11dac2	tipremove