ScrollPickerDecoration constructor 
    
      const
      ScrollPickerDecoration({ - Widget scrollItemBuilder(
 - BuildContext context, 
 
- int index, 
 
- dynamic value
 
)?,  
- Widget? highlightWidget, 
 
- TextStyle? scrollItemTextStyle, 
 
- int numberOfVisibleItems = 5, 
 
- double itemHeight = 30, 
 
- double diameterRatio = 2.0, 
 
- double perspective = 0.002, 
 
- double overAndUnderCenterOpacity = 1.0, 
 
- double offAxisFraction = 0.0, 
 
- bool useMagnifier = false, 
 
- double magnification = 1.0, 
 
- double squeeze = 1.0, 
 
- bool renderChildrenOutsideViewport = false, 
 
})
    
    
    
  Implementation
  const ScrollPickerDecoration({
  this.scrollItemBuilder,
  this.highlightWidget,
  this.scrollItemTextStyle,
  this.numberOfVisibleItems = 5,
  this.itemHeight = 30,
  this.diameterRatio = 2.0,
  this.perspective = 0.002,
  this.overAndUnderCenterOpacity = 1.0,
  this.offAxisFraction = 0.0,
  this.useMagnifier = false,
  this.magnification = 1.0,
  this.squeeze = 1.0,
  this.renderChildrenOutsideViewport = false,
});