1. Introduction
3. User Guide
4. 1. Getting Started
5. 2. Defining a Model
6. 3. Property Graphs
7. 1. 3.1. Exploring Without Indexes
   2. 3.2. Hash Indexes
   3. 3.3. Range Indexes
   4. 3.4. Full-text Indexes
8. 4. Derive Macros
9. 5. Basic Operations
10. 6. Graph Traversal
11. 1. 6.1. Walker Overview
    2. 6.2. Walker Steps
    3. 1. 6.2.1. vertices
       2. 6.2.2. vertices_by_id
       3. 6.2.3. edges
       4. 6.2.4. head
       5. 6.2.5. tail
       6. 6.2.6. filter
       7. 6.2.7. control_flow
       8. 6.2.8. map
       9. 6.2.9. fold
       10. 6.2.10. reduce
       11. 6.2.11. take
       12. 6.2.12. first
       13. 6.2.13. push_context
       14. 6.2.14. default_context
       15. 6.2.15. mutate_context
       16. 6.2.16. detour
       17. 6.2.17. collect
       18. 6.2.18. count
       19. 6.2.19. into_iter
       20. 6.2.20. probe
       21. 6.2.21. mutate
       22. 6.2.22. boxed
       23. 6.2.23. dbg
    4. 6.3. Context System
    5. 6.4. Best Practices
13. Implementation Guide
14. 7. Implementation Guide for Graph Backends
15. 8. Creating a Graph Implementation
16. 9. Testing Your Implementation
17. 10. Features and Extensions
18. 11. Implementing Indexes
19. 12. Benchmarking
21. Reference
22. 13. API Reference
23. 14. Support Traits
24. 15. Derive Macros
25. 16. Existing Implementations
26. 1. 16.1. SimpleGraph
    2. 16.2. PetGraph