[Discuss-gnuradio] constructor of block is not private

Dear Sir,

From the documentation, the constructor of user-defined block is often private.

But how come it is defined as public, refer below code.

This is a typical code generated by gr_modtool:

Filename: byte_source_impl.h

/* -*- c++ -*- */  #ifndef INCLUDED_HOWTO_BYTE_SOURCE_IMPL_H  #define INCLUDED_HOWTO_BYTE_SOURCE_IMPL_H    #include <howto/byte_source.h>    namespace gr {    namespace howto {        class byte_source_impl : public byte_source      {         private:            unsigned int counter;                     public:            byte_source_impl();   // constructor is public ??            ~byte_source_impl();              void forecast (int noutput_items, gr_vector_int &ninput_items_required);              int general_work(int noutput_items,                     gr_vector_int &ninput_items,                     gr_vector_const_void_star &input_items,                     gr_vector_void_star &output_items);      };      } // namespace howto  } // namespace gr