else -> null
        }
    }

    private fun provideSourceForInvokeFunction(function: FirSimpleFunction): PsiElement? {
        val classId = function.containingClassLookupTag()?.classId ?: return null
        val classOrObject = classByClassId(classId, function.llFirSession.ktModule) ?: return null
        return classOrObject.declarations.singleOrNull()
    }

            }
        }

        if (declaration is KtFunction && declaration !is KtConstructor<*> && declaration.equalsToken != null) {
            val bindingContext = analysisContext.analyze(declaration)
            val kotlinType = bindingContext[BindingContext.FUNCTION, declaration]?.returnType
                ?: ErrorUtils.createErrorType(ErrorTypeKind.IMPLICIT_RETURN_TYPE_FOR_FUNCTION, declaration.name ?: "<unknown>")

        val generatedTopLevelClassifiers = declarationGenerators
            .asSequence()
            .flatMap {
                // FIXME this function should be called only once during plugin's lifetime, so this usage is not really correct (2)
                it.getTopLevelClassIds()
            }
            .filter { it.packageFqName == packageFqName }

                scopeSession,
                stubBodyResolveTransformer,
                stubBodyResolveTransformer.context,
            )

        // TODO: this doesn't guarantee that the same synthetic function (as a SAM constructor) is created/returned
        fun getSamConstructor(firClass: FirRegularClass): FirSimpleFunction? {
            val samConstructor = bodyResolveComponents.samResolver.getSamConstructor(firClass) ?: return null

  }

  @Test
  @TestMetadata("callableReference_function.kt")
  public void testCallableReference_function() {
    runTest("analysis/analysis-api/testData/components/expressionTypeProvider/expectedExpressionType/callableReference_function.kt");
  }

  @Test
  @TestMetadata("conditionInWhenWithSubject.kt")
  public void testConditionInWhenWithSubject() {

        functionCall: FirFunctionCall,
        mode: KtConstantEvaluationMode,
    ): FirLiteralExpression<*>? {
        val function = functionCall.getOriginalFunction() as? FirSimpleFunction ?: return null

        val opr1 = evaluate(functionCall.explicitReceiver, mode) ?: return null
        opr1.evaluate(function)?.let {
            return it.adjustType(functionCall.resolvedType)
        }

        // Expected type of `expression` is `T`
        val function = expression.unwrapQualified<KtFunction> { function, expr -> function.bodyExpression == expr } ?: return null
        if (function.bodyBlockExpression != null) {
            // Given `fun f(...): R { blockExpression }`, `{ blockExpression }` is mapped to the enclosing anonymous function,

}

/**
 * Returns whether the function uses its body as an expression (i.e., the function uses the result value of the expression) or not.
 *
 * Named functions do not consider their bodies used if
 *  - the function body is a block e.g., `fun foo(): Int { return bar }` or
 *  - the function itself returns Unit
 */

import org.jetbrains.kotlin.name.JvmStandardClassIds
import org.jetbrains.kotlin.psi.KtCallElement
import org.jetbrains.kotlin.util.OperatorNameConventions

/**
 * Returns `true` if the symbol is for a function named `invoke`.
 */
internal fun FirBasedSymbol<*>.isInvokeFunction() =
    (this as? FirNamedFunctionSymbol)?.fir?.name == OperatorNameConventions.INVOKE

fun FirFunctionCall.getCalleeSymbol(): FirBasedSymbol<*>? =

  }

  @Test
  @TestMetadata("function_body_with_if.kt")
  public void testFunction_body_with_if() {
    runTest("analysis/analysis-api/testData/components/expressionInfoProvider/isUsedAsExpression/function_body_with_if.kt");
  }

  @Test
  @TestMetadata("function_equal_block_with_if.kt")
  public void testFunction_equal_block_with_if() {