function elementIdCssProperty (id, cssPropertyName) {
    if ((typeof id !== 'string' && typeof id !== 'number') || typeof cssPropertyName !== 'string') {
        throw new ProtocolError('number or type of arguments don\'t agree with elementIdCssProperty protocol command')
    }

    return this.requestHandler.create(`/session/:sessionId/element/${id}/css/${cssPropertyName}`)
}
Query the value of an element's computed CSS property. The CSS property to query
should be specified using the CSS property name, not the JavaScript property name
(e.g. background-color instead of backgroundColor).

@param {String} ID                ID of a WebElement JSON object to route the command to
@param  {String} cssPropertyName  CSS property

@return {String} The value of the specified CSS property.

@see  https://w3c.github.io/webdriver/webdriver-spec.html#get-element-property
@type protocol