Why Do Some Nodes Have Buttons?

Some nodes include a button on either its left or right edge. These allow manual  interaction with the node from within the editor and don’t require data to be passed to them. The Inject and Debug nodes are examples of common  nodes that have buttons. These buttons allow the user to manually trigger events after deployment of the flow. Catenis Nodes also come with both varieties of interactive and non-interactive nodes.  Below is a visual depiction of each type of node.