gzdoom/wadsrc/static/zscript/compatibility.txt

// This file contains compatibility wrappers for DECORATE functions with bad parameters.

extend class Actor
{
	deprecated void A_CustomMissile(class<Actor> missiletype, double spawnheight = 32, double spawnofs_xy = 0, double angle = 0, int flags = 0, double pitch = 0, int ptr = AAPTR_TARGET)
	{
		A_SpawnProjectile(missiletype, spawnheight, spawnofs_xy, angle, flags|CMF_BADPITCH, pitch, ptr);
	}
}

extend class StateProvider
{
	deprecated action void A_FireCustomMissile(class<Actor> missiletype, double angle = 0, bool useammo = true, double spawnofs_xy = 0, double spawnheight = 0, int flags = 0, double pitch = 0)
	{
		A_FireProjectile(missiletype, angle, useammo, spawnofs_xy, spawnheight, flags, -pitch);
	}
}