code: function isInteraction (node) {
    return isLLCall(node) || isLLSend(node) || isExternalDirectCall(node) || isTransfer(node) || isLLCall050(node) || isLLSend050(node)
  }
docs: True if is interaction with external contract (change in context, no delegate calls) (send, call of other contracts)
  @node {ASTNode} some AstNode
  @return {bool}