1. DomName('AnalyserNode.getFloatFrequencyData')
  2. DocsEditable()
void getFloatFrequencyData(Float32List array)

Source 

@DomName('AnalyserNode.getFloatFrequencyData')
@DocsEditable()
void getFloatFrequencyData(Float32List array) => _blink.BlinkAnalyserNode.instance.getFloatFrequencyData_Callback_1_(this, array);