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