syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // See https://bitbucket.org/tari/llvm-sys.rs/issues/12/
context_before:     // Link libffi if the user requested this workaround.
context_after:     let force_ffi = env::var_os(&*ENV_FORCE_FFI).is_some();