#include "git2/sys/odb_backend.h" typedef struct { git_odb_backend parent; git_error_code error_code; git_oid oid; int exists_calls; int read_calls; int read_header_calls; int read_prefix_calls; } fake_backend; int build_fake_backend( git_odb_backend **out, git_error_code error_code, const git_oid *oid);