code: def get_source_name(self, src_id):
          
          len_out = _ffi.new('unsigned int *')
          rv = rustcall(_lib.lsm_view_get_source_name,
                        self._get_ptr(), src_id, len_out)
          if rv:
              return decode_rust_str(rv, len_out[0])
docs: Returns the name of the given source.