syntax_data: {"ast_node_type":"other","tokens":[{"end":159,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// Appends the two values, which are required to be metadata nodes. However, duplicate entries in the second list are dropped during the append operation.
context_before:     LLVMModuleFlagBehaviorAppend,
context_after:     LLVMModuleFlagBehaviorAppendUnique,