added DetermineCondition authored by Lxlp's avatar Lxlp
## Description
Sets whether gravity affects the target entity.
## Attributes
| Attribute | Aliases | Description | Default |
|-----------|-----------|----------------------------------------------------------------------|---------|
| gravity | g, b, bool, u, use | Sets whether the entity uses gravity | true |
## Examples
```yaml
Skills:
- setgravity{g=false} @self ~onSpawn
- setusegravity{g=false} @self ~onSpawn
- ...
```
## Aliases
- [x] setusegravity
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