1. @DomName('WebGL2RenderingContext.lineWidth')
  2. @DocsEditable()
  3. @Experimental()
void lineWidth(num width)

Source 

@DomName('WebGL2RenderingContext.lineWidth')
@DocsEditable()
@Experimental() // untriaged
void lineWidth(num width) => _blink.BlinkWebGL2RenderingContext.instance
    .lineWidth_Callback_1_(this, width);