Now in checks we can get nil dereference while both struct has Content field of nil. But in code we cheching for nil, and I believe that testcase can be real:

urls1 := URLs{};
urls2 := URLs{};
urls1.Equal(urls2);

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Optimization (provides speedup with no functional changes)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Unit tests added/updated
• Internal documentation updated
• Create a documentation update request here