Drawing an peak boundary shape

var graphinstance = new Graph( domGraph );

graphinstance.getXAxis().forceMin( 0 );
graphinstance.getXAxis().forceMax( 50 );

graphinstance.getYAxis().forceMin( 0 );
graphinstance.getYAxis().forceMax( 50 );

graphinstance.updateAxes();

var shape = graphinstance.newShape( {
  type: 'peakboundariescenter',
  pos: {
    x: 10,
    y: 10
  },
  fillColor: 'rgba(200, 100, 100, 0.5)',
  strokeColor: 'black',
  locked: false,
  selectable: true,

  label: {
    position: {
      x: 4,
      y: 3
    },
    text: 'test'
  }
} );

shape.setData( 'pos', { 
  x: 10
} );
shape.setData( 'pos2', { 
  x: 2
} );
shape.setData( 'posCenter', { 
  x: 3
} );

shape.setY( 20 );

shape.draw();

graphinstance.redraw();
graphinstance.drawSeries();