Date.add(Number,String)

Outcome: Date&Time

Date.addDays(Number)

Output: Date

Date.after(Date)

Output: Boolean

Date.before(Date)

Output: Boolean

(Date.difference(Date)).asHours()

Output: Duration

Date.isEqualTo(Date)

Output: Boolean

Date.isNotEqualTo(Date)

Output: Boolean

Date.isoString()

Output: String

(Date.minus(Date)).asHours()

Output: Decimal

Date.plus(Duration)

Output: Date

Date.subtract('amount', 'unit)

Unit unklar