1. @DomName('WebGL2RenderingContext.generateMipmap')
  2. @DocsEditable()
  3. @Experimental()
void generateMipmap(int target)

Source 

@DomName('WebGL2RenderingContext.generateMipmap')
@DocsEditable()
@Experimental() // untriaged
void generateMipmap(int target) => _blink.BlinkWebGL2RenderingContext.instance
    .generateMipmap_Callback_1_(this, target);