@fn neo4j_value_t neo4j_map_get(neo4j_value_t value, const char *key);
@brief Return a value from a neo4j map.
Note that the result is undefined if the value is not of type NEO4J_MAP.
@param value The neo4j map.
@param key The null terminated string key for the entry.
@return The value stored under the specified key, or NULL if the key is
not known.
@fn neo4j_value_t neo4j_map_get(neo4j_value_t value, const char *key); @brief Return a value from a neo4j map.
Note that the result is undefined if the value is not of type NEO4J_MAP.
@param value The neo4j map. @param key The null terminated string key for the entry. @return The value stored under the specified key, or NULL if the key is not known.