| crypto/sha256 | Package sha256 implements the SHA224 and SHA256 hash algorithms as defined in FIPS 180-4. |
| encoding/json | Package json implements encoding and decoding of JSON as defined in RFC 7159. |
| errors | Package errors implements functions to manipulate errors. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| golang.org/x/net/context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| golang.org/x/oauth2 | Package oauth2 provides support for making OAuth2 authorized and authenticated HTTP requests, as specified in RFC 6749. |
| google.golang.org/api/clouddebugger/v2 | |
| google.golang.org/api/googleapi | |
| google.golang.org/api/option | |
| google.golang.org/api/transport/http | |
| log | Package log implements a simple logging package. |
| sync | Package sync provides basic synchronization primitives such as mutual exclusion locks. |