Ported 'ConvertLambdaBodyExpressionToStatementAction'.
Fixed 'ConvertLambdaBodyExpressionToStatementAction'.
Simple & parenthesized lambda expressions are different nodes in
roslyn.
Ported 'ConvertLambdaBodyStatementToExpressionAction'.
Ported ConvertLambdaToAnonymousDelegateAction.
The type lookup is failing for some unknown reason.