Function IsSource

tensorflow/core/graph/graph.h:849–849

// Helper routines

inline bool IsSource(const Node* node) { return node->IsSource(); }
inline bool IsSink(const Node* node) { return node->IsSink(); }
inline bool IsSwitch(const Node* node) { return node->IsSwitch(); }
inline bool IsMerge(const Node* node) { return node->IsMerge(); }