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Describe the bug
In the recent versions of the library, I've seen an issue with vectors on custom nodes, where they get initialized to have the following string: json:[]
How to Reproduce*
I have a node that has an input port like this:
BT::InputPort<std::vector<std::string>>("string_vector", {}, "A string vector"),
And I don't declare any input on the XML file so I expect the vector to be empty. I print then the contents on the node and I get this