syntax_data: {"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"check!(self.is_like_wasm,"}]}
source_snippet:             check!(self.is_like_wasm, "the `emcscripten` os only makes sense on wasm-like targets");
context_before:         if self.os == "emscripten" {
context_after:         }