Objective:
Refactor the logic for retrieving a Neo.grid.Row component instance given a data record into a reusable helper method getRow(record) within Neo.grid.Body.

Current State:
Neo.grid.column.AnimatedChange manually calculates the row index and accesses the body's item array using modulo arithmetic:

row = body.items[body.store.indexOf(record) % body.items.length]

Proposed Change:

1. Implement Neo.grid.Body.getRow(record):
   • Find the record's index in the store.
   • Verify the index is within the currently mountedRows range.
   • Return the corresponding Row component from the pool.
2. Update Consumers: Refactor Neo.grid.column.AnimatedChange to use this new method.

Benefits:

• Encapsulation: Hides row pooling implementation details (modulo logic) from columns.
• Safety: Ensures the returned row is actually currently mounted and assigned to the target record.
• Reusability: Useful for other column types or controllers needing row access.