public DateFormatter::formatInterval($interval, $granularity = 2, $langcode

public DateFormat::isLocked() Determines

public DateFormatterInterface::formatTimeDiffUntil($timestamp

The human-readable name of the date format entity. Type: string File

public static DateTimePlus::createFromFormat($format, $time, $timezone

public DateTimePlus::render() Renders

The value of the timezone passed to the constructor. File core/lib/Drupal/Component/Datetime/DateTimePlus

public DateTimePlus::__call($method, $args)

protected DateTimePlus::prepareTimezone($timezone)

The value of the language code passed to the constructor. File core/lib/Drupal/Component/Datetime/DateTimePlus