setDecorations 
  abstract fun setDecorations(decorationType: TextEditorDecorationType, rangesOrOptions: ReadonlyArray<Range>)(source)
Adds a set of decorations to the text editor. If a set of decorations already exists with the given decoration type, they will be replaced. If rangesOrOptions is empty, the existing decorations with the given decoration type will be removed.
Parameters
decorationType 
A decoration type.
rangesOrOptions  
See also
createTextEditorDecorationType    
abstract fun setDecorations(decorationType: TextEditorDecorationType, rangesOrOptions: ReadonlyArray<DecorationOptions>)(source)