return is_pv1_scalar_field(field)

    def is_sequence_field(field: ModelField) -> bool:
        return field.shape in sequence_shapes or _annotation_is_sequence(field.type_)  # type: ignore[attr-defined]

    def is_scalar_sequence_field(field: ModelField) -> bool:
        return is_pv1_scalar_sequence_field(field)

    def is_bytes_field(field: ModelField) -> bool: