I would like to add styles on top of whats available in the package

This is what I am trying.It is removing everything but what I kept below and what I understood is, basically by doing below I am overwriting whats avaialble.

styleManager : {
			sectors: [{
				name: 'Dimension',
				buildProps: ['width', 'min-height'],
				properties:[{
					property: 'width', // Use 'property' as id
					min: 30
				}]
			},{
				name: 'Extra',
				buildProps: ['background-color', 'box-shadow']
			}]
		},

Warm regards
Milap