I was chatting on irc with dmytrok (kudos to him about the tip below) about the Solar View Helpers and it seems there's a very simple way of using multiple functions in a solar view helper.

As you know, for creating a Solar View Helper you create a class like:

class Vendor_View_Helper_MyTest extends Solar_View_Helper {

public function myTest()
{
// logic here
}
}

And then you can call it in your views by using $this->myTest() and all will go well.

For having multiple functions in that helper you must make it return the $this object so you can access the inside functions.

class Vendor_View_Helper_MyTest extends Solar_View_Helper {

public function myTest()
{
return $this;
}

public function Inside()
{
//logic here
}
}

Now you can access any function side the myTest helper like

$this->myTest()->Inside();