1. @DomName('WebGL2RenderingContext.uniform4f')
  2. @DocsEditable()
  3. @Experimental()
void uniform4f(UniformLocation location, num x, num y, num z, num w)

Source 

@DomName('WebGL2RenderingContext.uniform4f')
@DocsEditable()
@Experimental() // untriaged
void uniform4f(UniformLocation location, num x, num y, num z, num w) =>
    _blink.BlinkWebGL2RenderingContext.instance
        .uniform4f_Callback_5_(this, location, x, y, z, w);