`std.datetime.date_time.this` - multiple declarations

Function DateTime.this

ref this(
  const(Date) date,
  const(TimeOfDay) tod = TimeOfDay(cast(ubyte)0u, cast(ubyte)0u, cast(ubyte)0u)
) pure nothrow @safe;

Name	Description
date	The `date` portion of `DateTime`.
tod	The time portion of `DateTime`.

ref this(
  int year,
  int month,
  int day,
  int hour = 0,
  int minute = 0,
  int second = 0
) pure @safe;

Name	Description
year	The `year` portion of the `date`.
month	The `month` portion of the `date`.
day	The `day` portion of the `date`.
hour	The `hour` portion of the time;
minute	The `minute` portion of the time;
second	The `second` portion of the time;