[Home](./index.md) > [server](./server.md) > [CollisionGroupsBuilder](./server.collisiongroupsbuilder.md) > [isDefaultCollisionGroups](./server.collisiongroupsbuilder.isdefaultcollisiongroups.md) ## CollisionGroupsBuilder.isDefaultCollisionGroups() method Checks if the collision groups are the default collision groups. **Signature:** ```typescript static isDefaultCollisionGroups(collisionGroups: CollisionGroups): boolean; ``` ## Parameters

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

**Returns:** boolean Whether the collision groups are the default collision groups.