Is my FieldRowPanel wrong?
padding = FieldRowPanel([
        FieldPanel(blocks.ChoiceBlock(
        required=False, choices=PADDING_CHOICES, label="Отступ сверху")),
        FieldPanel(blocks.ChoiceBlock(
        required=False, choices=PADDING_CHOICES, label="Отступ снизу")),
    ], heading="Отступы")
I am trying to do it in this place:
class ContentBlockThemed(blocks.StructBlock):
    theme = blocks.ChoiceBlock(
        required=True, choices=BLOCK_THEMES_CHOICES, label="Тема")
    padding = FieldRowPanel([
        FieldPanel(blocks.ChoiceBlock(
        required=False, choices=PADDING_CHOICES, label="Отступ сверху")),
        FieldPanel(blocks.ChoiceBlock(
        required=False, choices=PADDING_CHOICES, label="Отступ снизу")),
    ], heading="Отступы")
    visible = blocks.BooleanBlock(required=False, label="Видимый", default=True, help_text="По умолчанию - True")
    block_content = ContentBlock()
    class Meta:
        icon = 'user'
        form_classname = 'content-block struct-block pages-content-block'
        template = 'wtblocks/content_block.html'
Nothing is displayed in the admin, although there is no error
 
                        
This is not valid code.
blocks.ChoiceBlockis only valid inside a StreamField definitionFieldRowPanelandFieldPanelare not valid inside a StreamField definition, only inside the 'panels' definition of a modelFieldPanelshould be passed a field name as a string, not a block objectTo control the layout of the edit form for a StructBlock (i.e. the equivalent of how you'd use FieldRowPanel in a panel definition), you need to define that layout as an HTML template and set that template as
form_templatein the block's Meta section.