How to use the @here/harp-geoutils.EarthConstants.MAX_ELEVATION function in @here/harp-geoutils

(material as any).onBeforeCompile = (shader: THREE.Shader) => {
            shader.fragmentShader = shader.fragmentShader.replace(
                "#include ",
                `#include 
    uniform sampler2D displacementMap;
    uniform float displacementScale;
    uniform float displacementBias;`
            );
            shader.fragmentShader = shader.fragmentShader.replace(
                "#include ",
                `#ifdef USE_MAP
    float minElevation = ${EarthConstants.MIN_ELEVATION.toFixed(1)};
    float maxElevation = ${EarthConstants.MAX_ELEVATION.toFixed(1)};
    float elevationRange = maxElevation - minElevation;

    float disp = texture2D( displacementMap, vUv ).x * displacementScale + displacementBias;
    vec4 texelColor = texture2D( map, vec2((disp - minElevation) / elevationRange, 0.0) );
    texelColor = mapTexelToLinear( texelColor );
    diffuseColor *= texelColor;
#endif`
            );
            // We remove the displacement map from manipulating the vertices, it is
            // however still required for the pixel shader, so it can't be directly
            // removed.
            shader.vertexShader = shader.vertexShader.replace(
                "#include ",
                ""
            );
        };