code: public function get(string $name): Block {
          if (isset($this->_blocks[$name]))
              return $this->_blocks[$name];
  
          $this->_blocks[$name] = new $this->block_class($name);
  
          return $this->_blocks[$name];
      }
docs: Create a new block, or get an existing block
  @static
  @param $name string Block name
  @return Block