docs: def make_process_header(self, slug, typ, version, source_uri, description, inputs):
          """Generate a process definition header.
  
          :param str slug: process' slug
          :param str typ: process' type
          :param str version:  process' version
          :param str source_uri: url to the process definition
          :param str description: process' description
          :param dict inputs: process' inputs
  
          """
          node = addnodes.desc()
          signode = addnodes.desc_signature(slug, '')
          node.append(signode)
  
          node['objtype'] = node['desctype'] = typ
  
          signode += addnodes.desc_annotation(typ, typ, classes=['process-type'])
          signode += addnodes.desc_addname('', '')
          signode += addnodes.desc_name(slug + ' ', slug + ' ')
  
          paramlist = addnodes.desc_parameterlist()
  
          for field_schema, _, _ in iterate_schema({}, inputs, ''):
              field_type = field_schema['type']
              field_name = field_schema['name']
  
              field_default = field_schema.get('default', None)
              field_default = '' if field_default is None else '={}'.format(field_default)
  
              param = addnodes.desc_parameter('', '', noemph=True)
              param += nodes.emphasis(field_type, field_type, classes=['process-type'])
              # separate by non-breaking space in the output
              param += nodes.strong(text='\xa0\xa0' + field_name)
  
              paramlist += param
  
          signode += paramlist
          signode += nodes.reference('', nodes.Text('[Source: v{}]'.format(version)),
                                     refuri=source_uri, classes=['viewcode-link'])
  
          desc = nodes.paragraph()
          desc += nodes.Text(description, description)
  
          return [node, desc]