The migration configuration entity always contains a source key. The value is an associative array containing the name of the plugin and the configuration of it. Only the plugin key-value pair is mandatory, some plugins might not have any configurations.
source: plugin: d6_node
Googling I see examples outhere that use
d7_node but what does one use to migrate nodes from d8 to d8?
Looking at the
core/modules/node/src/Plugin/migrate/source folder there is no such thing as