[Home](./index.md) > [server](./server.md) > [CollisionGroupsBuilder](./server.collisiongroupsbuilder.md) > [decodeCollisionGroups](./server.collisiongroupsbuilder.decodecollisiongroups.md) ## CollisionGroupsBuilder.decodeCollisionGroups() method Decodes a set of collision groups into a set of their string equivalents. **Signature:** ```typescript static decodeCollisionGroups(collisionGroups: CollisionGroups): DecodedCollisionGroups; ``` ## Parameters

Parameter	Type	Description
collisionGroups	[CollisionGroups](./server.collisiongroups.md)	The set of collision groups to decode.

**Returns:** [DecodedCollisionGroups](./server.decodedcollisiongroups.md) A set of collision groups represented as their string equivalents.