PFNGLCOMBINERINPUTNVPROCDart typedef
        PFNGLCOMBINERINPUTNVPROCDart =
     void Function(int stage, int portion, int variable, int input, int mapping, int componentUsage)
    
    
    
Implementation
typedef PFNGLCOMBINERINPUTNVPROCDart =
    void Function(
      int stage,
      int portion,
      int variable,
      int input,
      int mapping,
      int componentUsage,
    );