Adding options to a button?

Question

I've got the following code:
obj = w.add('panel', [45,50,350,135], 'Title');
How do I add options, such as size, margins, alignChildren to this panel?
If I would do this in Script UI I'de do something like this:
var layout = "dialog {  \
    text: 'Title',  \
    orientation: 'column', \
    alignChildren: ['fill', 'top'],  \
    preferredSize:[340, 135], \
    margins: 15, \
        calculator: Panel { \
            text: 'Sub-Title', \
            orientation: 'row', \
            alignChildren: 'fill', \
            margins: 15, \
But since I'm developing for Photoshop CC 2014, I can't use this syntax.

Answer 1

You can pass in the needed Creation Properties like this:
obj = w.add('panel', [45,50,350,135], 'Title', { alignChildren : 'fill',  orientation : 'row', margins : 15 } ); 
or (probably) set them manually like this:
obj = w.add('panel', [45,50,350,135], 'Title');
obj.alignChildren = 'fill';
obj.orientation = 'row';
obj.margins = 15;