question: protected void addOutputNode_internal ( BNode outputNode ) { if ( outputNodes . containsKey ( outputNode . getId ( ) ) ) { log . fine ( "node " + outputNode . getId ( ) + " already included in the output nodes of " + nodeId ) ; } else { outputNodes . put ( outputNode . getId ( ) , outputNode ) ; } }
target:  Adds a new outgoing relation to the node. This method should never be called outside the addRelation method, to ensure consistency between the input and output links.