start := time.Now()
	req := testRequest{Num: 1, String: testPayload}
	resp, err := h1.Call(context.Background(), remoteConn, &req)
	errFatal(err)
	if resp.OrgString != testPayload {
		t.Errorf("want %q, got %q", testPayload, resp.OrgString)
	}
	t.Log("Roundtrip:", time.Since(start))
	h1.PutResponse(resp)

	start = time.Now()
	resp, err = h2.Call(context.Background(), remoteConn, &testRequest{Num: 1, String: testPayload})

		cause:      err,
	}
}

func errIncorrectSQLFunctionArgumentType(err error) *s3Error {
	return &s3Error{
		code:       "IncorrectSqlFunctionArgumentType",
		message:    "Incorrect type of arguments in function call.",
		statusCode: 400,
		cause:      err,
	}
}

func errLikeInvalidInputs(err error) *s3Error {
	return &s3Error{
		code:       "LikeInvalidInputs",

	case "BC", "BCL", "BEQ", "BGE", "BGT", "BL", "BLE", "BLT", "BNE", "BR", "BVC", "BVS", "BDNZ", "BDZ", "CALL", "JMP":
		return true
	}
	return false
}

// IsPPC64CMP reports whether the op (as defined by an ppc64.A* constant) is
// one of the CMP instructions that require special handling.
func IsPPC64CMP(op obj.As) bool {
	switch op {
	case ppc64.ACMP, ppc64.ACMPU, ppc64.ACMPW, ppc64.ACMPWU, ppc64.AFCMPO, ppc64.AFCMPU:
		return true

	case "BEQ", "BFPF", "BFPT", "BGEZ", "BGEZAL", "BGTZ", "BLEZ", "BLTZ", "BLTZAL", "BNE", "JMP", "JAL", "CALL":
		return true
	}
	return false
}

// IsMIPSCMP reports whether the op (as defined by an mips.A* constant) is
// one of the CMP instructions that require special handling.
func IsMIPSCMP(op obj.As) bool {
	switch op {
	case mips.ACMPEQF, mips.ACMPEQD, mips.ACMPGEF, mips.ACMPGED,
		mips.ACMPGTF, mips.ACMPGTD:
		return true
	}

			// empty or `madmin.Default`.
			writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(ErrAdminConfigLDAPNonDefaultConfigName), r.URL)
			return
		}
	}

	// Check that this is a valid Create vs Update API call.
	s := globalServerConfig.Clone()
	if apiErrCode := handleCreateUpdateValidation(s, subSys, cfgTarget, isUpdate); apiErrCode != ErrNone {
		writeErrorResponseJSON(ctx, w, errorCodes.ToAPIErr(apiErrCode), r.URL)
		return
	}

	// Indicate that the liveness check for a peer call
	req.Header.Set(xhttp.MinIOPeerCall, "true")

	resp, err := httpClient.Do(req)
	if err != nil {
		return err
	}
	xhttp.DrainBody(resp.Body)

	return nil
}

// connect to list of endpoints and load all Erasure disk formats, validate the formats are correct
// and are in quorum, if no formats are found attempt to initialize all of them for the first

	switch word {
	case "BEQ", "BFPF", "BFPT", "BLTZ", "BGEZ", "BLEZ", "BGTZ", "BLT", "BLTU", "JIRL", "BNE", "BGE", "BGEU", "JMP", "JAL", "CALL":
		return true
	}
	return false
}

// IsLoong64MUL reports whether the op (as defined by an loong64.A* constant) is
// one of the MUL/DIV/REM instructions that require special handling.
func IsLoong64MUL(op obj.As) bool {
	switch op {
	case loong64.AMUL, loong64.AMULU, loong64.AMULV, loong64.AMULVU,

}

func main() {
	flag.Parse()
	if token == "" || roleArn == "" {
		flag.PrintDefaults()
		return
	}

	// The credentials package in minio-go provides an interface to call the
	// AssumeRoleWithCustomToken STS API.

	var opts []cr.CustomTokenOpt
	if expiryDuration != 0 {
		opts = append(opts, cr.CustomTokenValidityOpt(expiryDuration))
	}

	// Initialize

	// subtype to avoid recursive call to UnmarshalJSON()
	type subArgs Args
	var so subArgs

	if err := json.Unmarshal(data, &so); err != nil {
		return err
	}

	oa := Args(so)
	if oa.URL == nil || oa.URL.String() == "" {
		*a = oa
		return nil
	}

	*a = oa
	return nil
}

// Opa - implements opa policy agent calls.
type Opa struct {
	args   Args
	client *http.Client

Actually, all (or most) of the web frameworks work in this same way.

You never call those functions directly. They are called by your framework (in this case, **FastAPI**).