code: def update(self, d, ignore_errors=True, block_user_signals=False):
          
          if not type(d) == dict: d = d.headers
  
          # Update the lazy load
          self._lazy_load.update(d)
  
          # loop over the dictionary and update
          for k in list(self._lazy_load.keys()):
  
              # Only proceed if the parameter exists
              if not self._find_parameter(k.split('/'), False, True) == None:
  
                  # Pop the value so it's not set again in the future
                  v = self._lazy_load.pop(k)
                  self._set_value_safe(k, v, ignore_errors, block_user_signals)
  
          return self
docs: Supply a dictionary or databox with a header of the same format
          and see what happens! (Hint: it updates the existing values.)
          
          This will store non-existent key-value pairs in the dictionary 
          self._lazy_load. When you add settings in the future,
          these will be checked for the default values.