added isSkill condition authored by Lxlp's avatar Lxlp
## Description
Checks if the given [variable](/Skills/Variables) is set.
## Attributes
| Attribute | Aliases | Description | Default |
|-----------|-----------|----------------------------------------------------------------------|---------|
| variable | name, n, var, key, k | The name of the variable. Can optionally be prefixed with scope| |
| scope | s | The [scope](/Skills/Variables#variable-scopes) of the variable, e.g. where the variable is located |<!--type:VariableScope-->|
## Examples
```yaml
Conditions:
- variableisset{var=target.dazed} true
```
## Aliases
- [x] varisset
- [x] varset
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