The key factor is that a dependency should be a "callable".

A "**callable**" in Python is anything that Python can "call" like a function.

So, if you have an object `something` (that might _not_ be a function) and you can "call" it (execute it) like:

```Python
something()
```

or

```Python
something(some_argument, some_keyword_argument="foo")
```

	return c.call(ctx, lockRPCRUnlock, &args)
}

// Refresh calls Refresh REST API.
func (c *lockRESTClient) Refresh(ctx context.Context, args dsync.LockArgs) (reply bool, err error) {
	return c.call(ctx, lockRPCRefresh, &args)
}

// Unlock calls write unlock RPC.
func (c *lockRESTClient) Unlock(ctx context.Context, args dsync.LockArgs) (reply bool, err error) {
	return c.call(ctx, lockRPCUnlock, &args)
}

public final class okhttp3/coroutines/ExecuteAsyncKt {
	public static final fun executeAsync (Lokhttp3/Call;Lkotlin/coroutines/Continuation;)Ljava/lang/Object;

const maxInt = int(^uint(0) >> 1)

// Bytes returns a slice of length b.Len() holding the unread portion of the buffer.
// The slice is valid for use only until the next buffer modification (that is,
// only until the next call to a method like [Buffer.Read], [Buffer.Write], [Buffer.Reset], or [Buffer.Truncate]).
// The slice aliases the buffer content at least until the next buffer modification,

     * is referenced somewhere for as long as the enum class is loaded. *Maybe in theory* the enum
     * class could be unloaded after the above call to `getEnumConstants` but before we call
     * `get()`, but that is vanishingly unlikely.
     */
    return ref == null ? Optional.absent() : Optional.fromNullable(enumClass.cast(ref.get()));
  }

        UniAddress ua = new UniAddress(addr);
        // Act: first call should set to SMBSERVER_NAME
        String initial = ua.firstCalledName();
        // verify that subsequent call gives SMBSERVER_NAME
        String next = ua.nextCalledName();
        // Assert
        assertEquals(NbtAddress.SMBSERVER_NAME, next, "nextCalledName should return SMBSERVER_NAME after first call");
    }

    @Test

            }
            ExtraPropertiesExtension ext = t.getExtensions().getExtraProperties();
            ext.set("replaceSignatureFiles", new Closure<Void>(t) {
                @Override
                public Void call(Object... names) {
                    List<Path> resources = new ArrayList<>(names.length);
                    for (Object name : names) {
                        resources.add(resourcesDir.resolve("forbidden/" + name + ".txt"));

        });

        // For Trans2FindNext2 calls
        final int[] nextCall = { 0 };
        when(tree.send(any(Trans2FindNext2.class), any(Trans2FindFirst2Response.class))).thenAnswer((InvocationOnMock inv) -> {
            Trans2FindFirst2Response resp = inv.getArgument(1);
            int call = nextCall[0]++;
            String[] names = batches.get(call + 1);

    instance.Register(manager, handler)

    // The typed instance is also used for calls
    conn := manager.Connection("host")
    resp, err := instance.Call(ctx, conn, grid.NewMSSWith(map[string]string{"myfield": "myvalue"}))
    if err == nil {
        fmt.Println("Got response with field", resp["result"])
    }
```

The wrapper will handle all serialization and de-serialization of the request and response,

    before.assertRun();
    after.assertRun();
  }

  @SuppressWarnings("nullness") // test of a bogus call
  public void testNullListener() {
    assertThrows(NullPointerException.class, () -> future.addListener(null, directExecutor()));
  }

  @SuppressWarnings("nullness") // test of a bogus call
  public void testNullExecutor() {
    assertThrows(NullPointerException.class, () -> future.addListener(doNothing(), null));