syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"R:"}]}
source_snippet:         R: LLVMOrcMaterializationResponsibilityRef,
context_before:         ObjLayer: LLVMOrcObjectLayerRef,
context_after:         ObjBuffer: LLVMMemoryBufferRef,