x	- Column index (from left)
y	- Row index (from top)
cols -	Width in grid columns
rows -	Height in grid rows


gridType: GridType.Fixed,
fixedColWidth: 50,
fixedRowHeight: 50,
margin: 10,
outerMargin: true


Base size calculation

Item width  = (cols × fixedColWidth)  + inner margins
Item height = (rows × fixedRowHeight) + inner margins


cols = 3
rows = 2

Width  ≈ (3 × 50) = 150px
Height ≈ (2 × 50) = 100px

fixedColWidth: 10,  based on these value only while resize the item the width and height of the item will be execute
fixedRowHeight: 10,

Total width =(cols × fixedColWidth) + ((cols − 1) × margin)   -- widget width formula
             (20 x 10) + ((20-1) x 10) 
             200 + 190 = 390 this is the width of widget