What FastAPI actually checks is that it is a "callable" (function, class or anything else) and the parameters defined.

If you pass a "callable" as a dependency in **FastAPI**, it will analyze the parameters for that "callable", and process them in the same way as the parameters for a *path operation function*. Including sub-dependencies.

query.additional.cache.response.fields=
query.additional.highlighted.fields=
query.additional.search.fields=
query.additional.facet.fields=
query.additional.sort.fields=
query.additional.analyzed.fields=
query.additional.not.analyzed.fields=
query.gsa.response.fields=UE,U,T,RK,S,LANG
query.gsa.default.lang=en
query.gsa.default.sort=
query.gsa.meta.prefix=MT_
query.gsa.index.field.charset=charset

 *
 * <p>This test class generates all of its own test cases in the {@link #suite()} method. Every
 * {@code enterXxx}, {@code tryEnterXxx}, and {@code waitForXxx} method of the {@code Monitor} class
 * is analyzed reflectively to determine appropriate test cases based on its signature. Additional
 * ad hoc test cases can be found in {@link SupplementalMonitorTest}.
 *
 * @author Justin T. Sampson
 */

     * resolution, this does not include the download of the files for the dependency artifacts. It is meant for mojos
     * that only want to analyze the set of transitive dependencies, in particular during early lifecycle phases where
     * full dependency resolution might fail due to projects which haven't been built yet.
     *

      },
      "fess_korean_normal": {
        "type": "nori_tokenizer",
        "decompound_mode": "mixed",
        "user_dictionary_rules": ["덕후", "버카충", "낄끼빠빠" ]
      }
    },
    "analyzer" : {
      "reading_analyzer" : {
        "type" : "custom",
        "tokenizer" : "fess_japanese_normal",
        "filter" : ["reading_form"]
      },
      "reading_term_analyzer" : {
        "type" : "custom",

        "discard_punctuation" : "false"
      },
      "fess_korean_normal": {
        "type": "seunjeon_tokenizer",
        "index_eojeol": false,
        "user_words": ["덕후", "버카충", "낄끼빠빠" ]
      }
    },
    "analyzer" : {
      "reading_analyzer" : {
        "type" : "custom",
        "tokenizer" : "fess_japanese_normal",
        "filter" : ["reading_form"]
      },
      "reading_term_analyzer" : {
        "type" : "custom",

      },
      "fess_korean_normal": {
        "type": "fess_korean_tokenizer",
        "decompound_mode": "mixed",
        "user_dict_path": "${fess.dictionary.path}ko/nori.txt"
      }
    },
    "analyzer" : {
      "reading_analyzer" : {
        "type" : "custom",
        "tokenizer" : "fess_japanese_normal",
        "filter" : ["reading_form"]
      },
      "reading_term_analyzer" : {
        "type" : "custom",

 *
 * <p>This test class generates all of its own test cases in the {@link #suite()} method. Every
 * {@code enterXxx}, {@code tryEnterXxx}, and {@code waitForXxx} method of the {@code Monitor} class
 * is analyzed reflectively to determine appropriate test cases based on its signature. Additional
 * ad hoc test cases can be found in {@link SupplementalMonitorTest}.
 *
 * @author Justin T. Sampson
 */

        "mode" : "normal",
        "discard_punctuation" : "false"
      },
      "pattern_split" : {
        "type" : "simple_pattern_split",
        "pattern" : "__and__"
      }
    },
    "analyzer" : {
      "reading_analyzer" : {
        "type" : "custom",
        "tokenizer" : "kuromoji_neologd_normal",
        "filter" : ["reading_form"]
      },
      "reading_term_analyzer" : {
        "type" : "custom",

Later you will see how **powerful** it can be.

/// tip

The fact that this is **standard Python** means that you will still get the **best possible developer experience** in your editor, with the tools you use to analyze and refactor your code, etc. ✨

And also that your code will be very compatible with many other Python tools and libraries. 🚀

///

## Type hints in **FastAPI**