[1.14.4] Get mouse over

[VoltDragon]

In 1.8 I'm sure you were able to do 

private void getMouseOver(float partialTicks) {
	Vec3d vec = Minecraft.getMinecraft().getRenderViewEntity().getLook(partialTicks);
}

AxisAlignedBB axisalignedbb = entity.getEntityBoundingBox();

if (axisalignedbb.isVecInside(vec)) {
	//etc..
}

This would allow you to get whether the mouse was over an entity. Any way to do this in 1.14, 1.15 or 1.12.2? Because I get the error:
The method isVecInside(Vec3i) is undefined for the type AxisAlignedBB

[imacatlolol]

The method is called contains now.