/// <summary>
/// Returns the hash code for the given instance.
/// </summary>
/// <param name="obj"> The instance. </param>
/// <returns> The hash code. </returns>
public virtual int GetHashCode(T?obj)
=> NonCapturingLazyInitializer.EnsureInitialized(
ref _hashCode, this, c => c.HashCodeExpression.Compile())(obj);
/// <summary>
/// Compares the two instances to determine if they are equal.
/// </summary>
/// <param name="x"> The first instance. </param>
/// <param name="y"> The second instance. </param>
/// <returns> <see langword="true" /> if they are equal; <see langword="false" /> otherwise. </returns>
public virtual bool Equals(T?x, T?y)
=> NonCapturingLazyInitializer.EnsureInitialized(
ref _equals, this, c => c.EqualsExpression.Compile())(x, y);
