## Use the instance as a dependency { #use-the-instance-as-a-dependency }

Then, we could use this `checker` in a `Depends(checker)`, instead of `Depends(FixedContentQueryChecker)`, because the dependency is the instance, `checker`, not the class itself.

And when solving the dependency, **FastAPI** will call this `checker` like:

```Python
checker(q="somequery")
```

        // handleDFSReferral(DfsReferralData, String): String, no checked exceptions
        Method m3 = clazz.getMethod("handleDFSReferral", DfsReferralData.class, String.class);
        assertEquals(String.class, m3.getReturnType());
        assertEquals(2, m3.getParameterCount());
        assertEquals(0, m3.getExceptionTypes().length);

        // Package check to ensure we are validating the correct type

        verify(transport).isSigningOptional();
        verify(transport).isSigningEnforced();
    }

    // Error propagation: signing checks may throw SmbException
    @Test
    @DisplayName("signing checks propagate SmbException")
    void signingChecks_throw() throws Exception {
        doThrow(new SmbException("opt error")).when(transport).isSigningOptional();

     */
    void setupResponse(Response resp);

    /**
     * Checks whether SMB message signing has been successfully negotiated.
     *
     * @return whether signing has been negotiated
     */
    boolean isSigningNegotiated();

    /**
     * Checks whether a specific capability has been negotiated.
     *
     * @param cap the capability flag to check
     * @return whether capability is negotiated
     */

{* ../../docs_src/query_params_str_validations/tutorial013_an_py39.py hl[9] *}

/// note

Keep in mind that in this case, FastAPI won't check the contents of the list.

For example, `list[int]` would check (and document) that the contents of the list are integers. But `list` alone wouldn't.

///

## Declare more metadata { #declare-more-metadata }

name: Scorecard supply-chain security
on:
  # For Branch-Protection check. Only the default branch is supported. See
  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
  branch_protection_rule:
  # To guarantee Maintained check is occasionally updated. See
  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
  schedule:
    - cron: '45 9 * * 0'
  push:
    branches: [ "master" ]

    }

    private boolean supportsMultiChannel() {
        // Check if both client and server support multi-channel
        if (!context.getConfig().isUseMultiChannel()) {
            return false;
        }

        // MS-SMB2: Check if server advertised SMB2_GLOBAL_CAP_MULTI_CHANNEL (0x00000008)
        // This capability should be checked from the negotiate response

     */
    private boolean isConnectionUnhealthy(SmbTransportImpl transport) {
        try {
            // Basic disconnection check
            if (transport.isDisconnected()) {
                return true;
            }

            // Check if transport is failed
            if (transport.isFailed()) {
                return true;
            }

name: Scorecards supply-chain security
on:
  # For Branch-Protection check. Only the default branch is supported. See
  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#branch-protection
  branch_protection_rule:
  # To guarantee Maintained check is occasionally updated. See
  # https://github.com/ossf/scorecard/blob/main/docs/checks.md#maintained
  schedule:
    - cron: '26 3 * * 2'
  push:
    branches: [ "master" ]

    * Use of hierarchical Pydantic models, Python `typing`’s `List` and `Dict`, etc.
    * And validators allow complex data schemas to be clearly and easily defined, checked and documented as JSON Schema.
    * You can have deeply **nested JSON** objects and have them all validated and annotated.
* **Extensible**: