code: function isDefaultOrNullQueryValue( value, key ) {
  	return value === undefined || value === null || DEFAULT_THEME_QUERY[ key ] === value;
  }
docs: Returns true if the specified key value query pair is identical to that of
  the default theme query, is null, or is undefined.
  
  @param  {*}       value Value to check
  @param  {String}  key   Key to check
  @return {Boolean}       Whether key value matches default query or is null