syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"Option<extern"}]}
source_snippet:     Option<extern "C" fn(arg1: LLVMDiagnosticInfoRef, arg2: *mut ::libc::c_void)>;
context_before: pub type LLVMDiagnosticHandler =
context_after: pub type LLVMYieldCallback = Option<extern "C" fn(arg1: LLVMContextRef, arg2: *mut ::libc::c_void)>;