Is there a way in the IEntityTypeConfiguration to add a where clause to the collection. As a simple (incomplete) example, I would like the Form.Items to only include the FormItems which have the FormId equal to the Form and ParentFormItemId equal to null.

public class Form
{
    public Guid FormId { get; set; }
    public List<FormItem> Items { get; set; }
}

public class FormItem
{
    public Guid FormItemId { get; set; }
    public Guid FormId { get; set; }
    public virtual Form Form { get; set; }
    public Guid? ParentFormItemId { get; set; }
    public List<FormItem> Children { get; set; }
}

public class FormConfiguration : IEntityTypeConfiguration<Form>
{
    public void Configure(EntityTypeBuilder<Form> builder)
    {
        builder.HasKey(u => u.FormId);

        builder
            .HasMany(x => x.Items)
            .WithOne(c => c.Form);
    }
}

so essentially is there a way to do something like

builder
    .HasMany(x => x.Items)
    .WithOne(c => c.Form)
    .Where(x => x.ParentFormId == null);

Form.Items would then only include the parent FormItems linked to that form, rather all the items linked to that form.

Thanks