# `GSStringByIsolatingCombiningMarks`

*Function*

Inserts U+25CC DOTTED CIRCLE in front of every combining mark.

## Declaration

```swift
func GSStringByIsolatingCombiningMarks(_ string: String) -> String
```

```objc
NSString *GSStringByIsolatingCombiningMarks(NSString *string);
```

```python
GSStringByIsolatingCombiningMarks(string: str) -> str
```

## See Also

### Strings

- [`GSCharNeedsQuotes`](/Core/GlyphsCore/GSCharNeedsQuotes)
- [`GSStringNeedsQuotes`](/Core/GlyphsCore/GSStringNeedsQuotes) — checks if the string needs quotes. &plain returns if there are non ascii chars that need UTF encoding
- [`GSGlyphNameContainsSuffix`](/Core/GlyphsCore/GSGlyphNameContainsSuffix) — Whether a glyph name contains a suffix delimited by glyph-name separators.