code: function setStyle(element, key, value) {
    assertType(element, Node, false, 'Invalid element specified');
    if (typeof value === 'number') value = String(value);
    if (value === null || value === undefined) value = '';
  
    element.style[key] = value;
  }
docs: Sets an inline CSS rule of a Node.
  
  @param {Node} element - Target element.
  @param {string} key - Name of the CSS rule in camelCase.
  @param {*} value - Value of the style. If a number is provided, it will be
  automatically suffixed with 'px'.
  
  @see {@link http://www.w3schools.com/jsref/dom_obj_style.asp}
  
  @alias module:requiem~dom.setStyle