PFNGLGETSEPARABLEFILTEREXTPROCDart typedef
        PFNGLGETSEPARABLEFILTEREXTPROCDart =
     void Function(int target, int format, int type, Pointer<NativeType>  row, Pointer<NativeType>  column, Pointer<NativeType>  span)
    
    
    
Implementation
typedef PFNGLGETSEPARABLEFILTEREXTPROCDart =
    void Function(
      int target,
      int format,
      int type,
      Pointer<NativeType> row,
      Pointer<NativeType> column,
      Pointer<NativeType> span,
    );