setCustomLineSpacing method
This parameter overrides the default behaviour of placing the lines on the screen.
Can be used to change the gaps between lines.
lineSpacing argument specifies the koefficient (1 is default).
reload argument specifies wether the native core should redraw the pages.
Pass "false" if this method is called before the book is opened.
Implementation
void setCustomLineSpacing(double lineSpacing, {bool reload = false}) {
setCustomLineSpacingNative?.call(_sdk, lineSpacing, reload);
}