How to use the diagram-js/lib/util/RenderUtil.createLine function in diagram-js

function drawLine(p, waypoints, attrs) {
    attrs = computeStyle(attrs, [ 'no-fill' ], {
      stroke: 'black',
      strokeWidth: 2,
      fill: 'none'
    });

    var line = createLine(waypoints, attrs);

    svgAppend(p, line);

    return line;
  }

function drawLine(parentGfx, waypoints, attrs) {
    attrs = computeStyle(attrs, [ 'no-fill' ], {
      stroke: 'black',
      strokeWidth: 2,
      fill: 'none'
    });

    var line = createLine(waypoints, attrs);

    svgAppend(parentGfx, line);

    return line;
  }

function drawLine(parentGfx, waypoints, attrs) {
    attrs = computeStyle(attrs, [ 'no-fill' ], {
      stroke: 'black',
      strokeWidth: 2,
      fill: 'none'
    });

    var line = createLine(waypoints, attrs);

    svgAppend(parentGfx, line);

    return line;
  }

this.drawCustomConnection = function(p, element) {
    var attrs = computeStyle(attrs, {
      stroke: '#ff471a',
      strokeWidth: 2
    });

    return svgAppend(p, createLine(element.waypoints, attrs));
  };

this.drawCustomConnection = function(p, element) {
    var attrs = computeStyle(attrs, {
      stroke: '#ff471a',
      strokeWidth: 2
    });

    return createLine(element.waypoints, attrs).appendTo(p);
  };

this.drawDSConnection = function(p, element) {
    let attrs = computeStyle(attrs, {
      stroke: '#000000',
      strokeWidth: 1.5,
      strokeLinejoin: 'round',
      strokeDasharray: '5, 5',
    });

    return svgAppend(p, createLine(element.waypoints, attrs));
  };