Get application data
/// Get application global states. Parse variables are put into \c global_states
/// \param app_id Application ID
/// \param global_states Key-value pairs to store variables
/// \return codes
/// * VTC_SUCCESS on success: key-values have been parsed correctly and put into global_states
/// * VTC_ERROR_INTERNAL if unable to instantiate parser
/// * VTC_ERROR_NOT_FOUND if key not found
vertices_application_get(uint64_t app_id, app_values_t * global_states);
app_id: application ID.
global_states: pointer to
app_values. This structure can store several key-value pairs (integer or byte slices). Make sure to init to 0 before passing to the function.
VTC_SUCCESSif the application data have been parsed into
VTC_ERROR_INTERALif the parser cannot be instantiated.