static _setImageryUniforms(uniformMap, uniforms) {
    for (const key in uniforms) {
      if (uniforms.hasOwnProperty(key)) {
        const name = `u_${key}`;
        uniformMap[name] = function () {
          return uniforms[key];
        };
      }
    }
  }
Fill the given uniform map with functions for all properties
in the given uniforms object.

The uniform names will be created as `u_<propertyName>`, and
their value will just be a function that returns the respective
property value.

@param {UniformMap} uniformMap The uniform map
@param {object} uniforms The uniforms