setPrinterDoubleColorMode method Null safety

void setPrinterDoubleColorMode(
  1. bool enable
)

设置双色打印开关

enable 是否允许双色打印

Implementation

void setPrinterDoubleColorMode(bool enable) {
  addBytes([0x1F, 0x1B, 0x1F, 0x62, 0x05, enable ? 1 : 0]);
}