PFNGLGETPROGRAMENVPARAMETERDVARBPROCDart typedef
        PFNGLGETPROGRAMENVPARAMETERDVARBPROCDart =
     void Function(int target, int index, Pointer<Double>  params)
    
    
    
Implementation
typedef PFNGLGETPROGRAMENVPARAMETERDVARBPROCDart =
    void Function(int target, int index, Pointer<Double> params);