private Expression CreateItemMappingExpression(ParameterExpression from)
{
if (this.aItemMapping.ResolvedMapping is IDirectMapping)
{
return(from);
}
var mapMethod = Delegate.CreateDelegate(
typeof(Func <,>).MakeGenericType(EnumerableReflection <TFrom> .ItemType, EnumerableReflection <TTo> .ItemType),
this.aItemMapping.ResolvedMapping,
MappingMethods.Map(EnumerableReflection <TFrom> .ItemType, EnumerableReflection <TTo> .ItemType)
);
return(Expression.Call(null, LinqMethods.Select(EnumerableReflection <TFrom> .ItemType, EnumerableReflection <TTo> .ItemType),
from,
Expression.Constant(mapMethod)
));
}