uml协作图

建模元素

occlusion:: 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
画法

occlusion:: eyIuLi9hc3NldHMvaW1hZ2VfMTc2MDE0MzY3MDkzMl8wLnBuZyI6eyJjb25maWciOnt9LCJlbGVtZW50cyI6W3sibGVmdCI6NTU4Ljc3Mjc5MDUyNzE4NzIsInRvcCI6MjAwLjc4MTcwOTgwNTUwODcsIndpZHRoIjoyMjguOTY2ODQzNDY1MjQ3MTcsImhlaWdodCI6MTkyLjU2MzU0NzY3Njk0NzYyLCJhbmdsZSI6MCwiY0lkIjoxfSx7ImxlZnQiOjEyMTAuNDc0ODM5OTc5MDM5OSwidG9wIjoyNDUuMTU2NzI1ODEzNzQ5OTQsIndpZHRoIjoyNzcuOTQ2Njc2MzQ0MzI1NiwiaGVpZ2h0IjoyNzEuMzE0OTQ1NzMwMDE4NDUsImFuZ2xlIjowLCJjSWQiOjJ9XX19