title: Equivalent of ClassMapping<T>.Property() in FluentNHibernate
body: <p>I've seen many examples of using <code>NHibernate.Mapping.ByCode.Conformist.ClassMapping&lt;T&gt;</code> like so:</p>
  
  <pre><code>public class MyNhMap : ClassMapping&lt;Entity&gt;
  {
      Property(a =&gt; a.Something, b =&gt; { b.Something(); });
  }
  </code></pre>
  
  <p>What is the equivalent syntax in Fluent NHibernate with <code>FluentNHibernate.Mapping.ClassMap&lt;T&gt;</code>?</p>
  
  <pre><code>public class MyFnhMap : ClassMap&lt;Entity&gt;
  {
      // ???
  }
  </code></pre>