❔ EF Core Fluent API - Unidirectional one to many relationship

        internal class Coordinate
        {
            private int Id { get; set; }
            public int X { get; set; }
            public int Y { get; set; }
        }

        internal class Square 
        {
            private int Id { get; set; }
            public ISet<Coordinate> Coordinates { get; set; } = new HashSet<Coordinate>();   
        }

        internal class CoordinateConfiguration : IEntityTypeConfiguration<Coordinate>
        {
            private const string ID = "Id";

            public void Configure(EntityTypeBuilder<Coordinate> builder)
            {
                builder.Property<int>(ID).ValueGeneratedOnAdd();
                builder.HasKey(ID);

                builder.Property(x => x.X).IsRequired();
                builder.Property(x => x.Y).IsRequired();
                builder.HasIndex(x => x.X);
                builder.HasIndex(x => x.Y);
            }
        }

        internal class SquareConfiguration : IEntityTypeConfiguration<Square>
        {
            private const string ID = "Id";

            public void Configure(EntityTypeBuilder<Square> builder)
            {
                builder.Property<int>(ID).ValueGeneratedOnAdd();
                builder.HasKey(ID);

                builder.HasMany(x => x.Coordinates)
                       .WithOne()
                       // .HasForeignKey() ??
                       .IsRequired();

                builder.Navigation(x => x.Coordinates).AutoInclude();
            }
        }