What's the 'text_node_property' in Neo4jVector?

Neo4j Graph Platform Graph Algorithms/Graph Data Science
1

I am following this graph rag tutorial using Neo4j, and have question to the Neo4jVector's API:

https://api.python.langchain.com/en/latest/vectorstores/langchain_community.vectorstores.neo4j_vector.Neo4jVector.html

when creating a vector index:

vector_index = Neo4jVector.from_existing_graph(
        embedding,
        url=uri,
        username=user,
        password=password,
        index_name='vectorIndex',
        node_label="Product",
        text_node_properties=['name', 'description'],
        embedding_node_property='embedding',
    )

And after creating the index, to load the index:

vector_index = Neo4jVector.from_existing_index(
        embedding,
        url=uri,
        username=user,
        password=password,
        index_name='vectorIndex',
        text_node_property = 'name'
    )

My question is, when in loading the index, why is it a single 'text_node_property', not a list of properties of text when comparing this field to text_node_properties=['name', 'description'],?