checkArgument(!list.isEmpty(), "number of hash functions (%s) must be > 0", list.size());
    return new ConcatenatedHashFunction(list.toArray(new HashFunction[0]));
  }

  private static final class ConcatenatedHashFunction extends AbstractCompositeHashFunction {

    private ConcatenatedHashFunction(HashFunction... functions) {
      super(functions);
      for (HashFunction function : functions) {
        checkArgument(

            api.type<GenericsVariance>().functions.forEach { function ->
                when (function.name) {
                    "invariant" -> function.parameters.single().assertSingleTypeArgumentWithVariance(Variance.INVARIANT)
                    "covariant" -> function.parameters.single().assertSingleTypeArgumentWithVariance(Variance.COVARIANT)

// RUN: tf-quant-opt %s -mark-functions-noinline='noinline-functions=noinline0' \
// RUN:     -allow-unregistered-dialect -mlir-disable-threading \
// RUN:     -split-input-file -verify-diagnostics | FileCheck %s

// Tests that the function is marked tf._noinline = true.

// CHECK-LABEL: @noinline0
// CHECK-SAME: attributes {{{.*tf._noinline = true.*}}}
func.func @noinline0() -> (tensor<0xf32>) {

	// within a package.
	ABIRefs obj.ABISet

	NumDefers  int32 // number of defer calls in the function
	NumReturns int32 // number of explicit returns in the function

	// NWBRCalls records the LSyms of functions called by this
	// function for go:nowritebarrierrec analysis. Only filled in
	// if nowritebarrierrecCheck != nil.
	NWBRCalls *[]SymAndPos

// Do not insert instructions to allocate a stack frame for this function.
// Only valid on functions that declare a frame size of 0.
#define NOFRAME 512
// Function can call reflect.Type.Method or reflect.Type.MethodByName.
#define REFLECTMETHOD 1024
// Function is the outermost frame of the call stack. Call stack unwinders
// should stop at this function.
#define TOPFRAME 2048
// Function is an ABI wrapper.

  // Same as `AddFunctionDef`, but additionally saves the `stack_traces` under
  // the key of the function definition name (to be retrieved during function
  // instantiation).
  virtual Status AddFunctionDefWithStackTraces(
      const FunctionDef& fdef, const StackTracesMap& stack_traces) = 0;

  // Find and return a added function by its name.

    checkArgument(!list.isEmpty(), "number of hash functions (%s) must be > 0", list.size());
    return new ConcatenatedHashFunction(list.toArray(new HashFunction[0]));
  }

  private static final class ConcatenatedHashFunction extends AbstractCompositeHashFunction {

    private ConcatenatedHashFunction(HashFunction... functions) {
      super(functions);
      for (HashFunction function : functions) {
        checkArgument(

}

// A filter can be used for an op or function.
message TacFilter {
  oneof filter {
    OpFilter op_filter = 1;
    FunctionFilter function_filter = 2;
  }
}

// Function filter is to include/exclude a function in the target annotation
// pass in the TAC tool pipeline.
message FunctionFilter {
  // Function filter types that are supported. If one function is matched for

	// Only valid on functions that declare a frame size of 0.
	// TODO(mwhudson): only implemented for ppc64x at present.
	NOFRAME = 512

	// Function can call reflect.Type.Method or reflect.Type.MethodByName.
	REFLECTMETHOD = 1024

	// Function is the outermost frame of the call stack. Call stack unwinders
	// should stop at this function.
	TOPFRAME = 2048

As dependencies will also be called by **FastAPI** (the same as your *path operation functions*), the same rules apply while defining your functions.

You can use `async def` or normal `def`.

And you can declare dependencies with `async def` inside of normal `def` *path operation functions*, or `def` dependencies inside of `async def` *path operation functions*, etc.

It doesn't matter. **FastAPI** will know what to do.

!!! note