/// <summary>
/// Creates a default converter where foreach is joined with some children statements but other children statements are kept unmodified.
/// Example:
/// foreach(...)
/// {
/// if (condition)
/// {
/// doSomething();
/// }
/// }
/// is converted to
/// foreach(... where condition)
/// {
/// doSomething();
/// }
/// </summary>
protected abstract IConverter <TForEachStatement, TStatement> CreateDefaultConverter(
ForEachInfo <TForEachStatement, TStatement> forEachInfo);
/// <summary>
/// Tries to build a specific converter that covers e.g. Count, ToList, yield return or other similar cases.
/// </summary>
protected abstract bool TryBuildSpecificConverter(
ForEachInfo <TForEachStatement, TStatement> forEachInfo,
SemanticModel semanticModel,
TStatement statementCannotBeConverted,
CancellationToken cancellationToken,
out IConverter <TForEachStatement, TStatement> converter);
