LineChart constructor
LineChart(})
Implementation
LineChart(this.lines, this.fromTo,
{this.tapTextFontWeight,
this.yAxisName,
String formatHoursMinutes = 'kk:mm',
String formatDayMonth = 'dd/MM'})
: this._formatHoursMinutes = DateFormat(formatHoursMinutes),
this._formatDayMonth = DateFormat(formatDayMonth);