estransforms

var (
	NewESNextTransformer = transformers.Chain(newESDecoratorTransformer, newUsingDeclarationTransformer)
	// 2025: only module system syntax (import attributes, json modules), untransformed regex modifiers
	// 2024: no new downlevel syntax
	// 2023: no new downlevel syntax
	NewES2022Transformer = transformers.Chain(NewESNextTransformer, newClassStaticBlockTransformer, newClassFieldsTransformer)    // !!! top level await? not transformed, just errored on at lower targets - also more of a module system feature anyway
	NewES2021Transformer = transformers.Chain(NewES2022Transformer, newLogicalAssignmentTransformer)                              // !!! numeric seperators? always elided by printer?
	NewES2020Transformer = transformers.Chain(NewES2021Transformer, newNullishCoalescingTransformer, newOptionalChainTransformer) // also dynamic import - module system feature
	NewES2019Transformer = transformers.Chain(NewES2020Transformer, newOptionalCatchTransformer)
	NewES2018Transformer = transformers.Chain(NewES2019Transformer, newObjectRestSpreadTransformer, newforawaitTransformer)
	NewES2017Transformer = transformers.Chain(NewES2018Transformer, newAsyncTransformer)
	NewES2016Transformer = transformers.Chain(NewES2017Transformer, newExponentiationTransformer)
)