Property graph

::: llama_index.core.indices options: members: - PropertyGraphIndex - PGRetriever - BasePGRetriever - CustomPGRetriever - CypherTemplateRetriever - LLMSynonymRetriever - TextToCypherRetriever - VectorContextRetriever - ImplicitPathExtractor - SchemaLLMPathExtractor - SimpleLLMPathExtractor