### Function: HasSpellImmunity(param1, param2, param3, param4)

**Description:**
Placeholder description.

**Parameters:**
- `param1`: Spawn - The spawn or entity involved.
- `param2`: unknown - Unknown type.
- `param3`: unknown - Unknown type.
- `param4`: int8 - Small integer or boolean flag.

**Returns:** None.

**Example:**

```lua
-- Example usage
HasSpellImmunity(..., ..., ..., ...)
```