String
public extension String- 
                  
                  Undocumented DeclarationSwift typealias DrawingOptions = NSDrawingOptions
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                  Convenience getter for string layout constraint. DeclarationSwift @available(OSX 10.11, iOS 10.0, *) func layoutConstraint(with options: String.DrawingOptions = .usesLineFragmentOrigin, attributes: [NSAttributedString.Key : Any]? = nil, context: NSStringDrawingContext? = nil) -> StringLayoutAnchorParametersattributesString attributes contextDrawing context Return ValueString-based constraint 
 String Extension Reference
        String Extension Reference