PFNGLTEXTURESTORAGEMEM3DEXTPROCDart typedef
        PFNGLTEXTURESTORAGEMEM3DEXTPROCDart =
     void Function(int texture, int levels, int internalFormat, int width, int height, int depth, int memory, int offset)
    
    
    
Implementation
typedef PFNGLTEXTURESTORAGEMEM3DEXTPROCDart =
    void Function(
      int texture,
      int levels,
      int internalFormat,
      int width,
      int height,
      int depth,
      int memory,
      int offset,
    );