PFNGLFLUSHMAPPEDNAMEDBUFFERRANGEEXTPROCDart typedef
        PFNGLFLUSHMAPPEDNAMEDBUFFERRANGEEXTPROCDart =
     void Function(int buffer, Pointer<NativeType>  offset, Pointer<Uint32>  length)
    
    
    
Implementation
typedef PFNGLFLUSHMAPPEDNAMEDBUFFERRANGEEXTPROCDart =
    void Function(
      int buffer,
      Pointer<NativeType> offset,
      Pointer<Uint32> length,
    );