# SafetyTier....(_:_:)

- **Module:** SafetyTier
- **Package:** libtmux-swift
- **Language:** Swift
- **Kind:** function
- **Page:** https://libtmux.org/reference/swift/safetytier-(_-_-)-1u4i/

```
SafetyTier....(_:_:)(minimum: Self, maximum: Self) -> ClosedRange<Self>
```

Returns a closed range that contains both of its bounds.

Use the closed range operator (`...`) to create a closed range of any type
that conforms to the `Comparable` protocol. This example creates a
`ClosedRange<Character>` from "a" up to, and including, "z".

    let lowercase = "a"..."z"
    print(lowercase.contains("z"))
    // Prints "true"

- Parameters:
  - minimum: The lower bound for the range.
  - maximum: The upper bound for the range.

- Precondition: `minimum <= maximum`.