import org.jetbrains.kotlin.analysis.utils.printer.parentOfType
import org.jetbrains.kotlin.fir.declarations.FirClass
import org.jetbrains.kotlin.fir.declarations.FirResolvePhase
import org.jetbrains.kotlin.fir.declarations.utils.delegateFields
import org.jetbrains.kotlin.fir.java.JavaScopeProvider
import org.jetbrains.kotlin.fir.java.declarations.FirJavaClass
import org.jetbrains.kotlin.fir.resolve.ScopeSession

import org.jetbrains.kotlin.fir.FirElement
import org.jetbrains.kotlin.fir.FirSession
import org.jetbrains.kotlin.fir.declarations.getAnnotationsByClassId
import org.jetbrains.kotlin.fir.declarations.getStringArgument
import org.jetbrains.kotlin.fir.declarations.toAnnotationClassId
import org.jetbrains.kotlin.fir.diagnostics.ConeDiagnostic
import org.jetbrains.kotlin.fir.diagnostics.ConeUnreportedDuplicateDiagnostic

</ol>

<p>
Blocks nest and influence <a href="#Declarations_and_scope">scoping</a>.
</p>


<h2 id="Declarations_and_scope">Declarations and scope</h2>

<p>
A <i>declaration</i> binds a non-<a href="#Blank_identifier">blank</a> identifier to a
<a href="#Constant_declarations">constant</a>,
<a href="#Type_declarations">type</a>,
<a href="#Type_parameter_declarations">type parameter</a>,

import org.jetbrains.kotlin.analysis.api.lifetime.withValidityAssertion
import org.jetbrains.kotlin.fir.FirSession
import org.jetbrains.kotlin.fir.declarations.FirResolvePhase
import org.jetbrains.kotlin.fir.declarations.toAnnotationClassId
import org.jetbrains.kotlin.fir.expressions.FirAnnotation
import org.jetbrains.kotlin.fir.expressions.FirAnnotationCall

import org.jetbrains.kotlin.descriptors.ClassKind
import org.jetbrains.kotlin.fir.analysis.checkers.getContainingClassSymbol
import org.jetbrains.kotlin.fir.declarations.FirClass
import org.jetbrains.kotlin.fir.declarations.getTargetType
import org.jetbrains.kotlin.fir.diagnostics.ConeSimpleDiagnostic
import org.jetbrains.kotlin.fir.expressions.*
import org.jetbrains.kotlin.fir.psi

import org.jetbrains.kotlin.analysis.utils.printer.parentsOfType
import org.jetbrains.kotlin.fir.*
import org.jetbrains.kotlin.fir.declarations.*
import org.jetbrains.kotlin.fir.declarations.builder.buildImport
import org.jetbrains.kotlin.fir.declarations.builder.buildResolvedImport
import org.jetbrains.kotlin.fir.declarations.utils.classId
import org.jetbrains.kotlin.fir.expressions.*
import org.jetbrains.kotlin.fir.expressions.builder.buildFunctionCall

import org.jetbrains.kotlin.fir.FirAnnotationContainer
import org.jetbrains.kotlin.fir.FirSession
import org.jetbrains.kotlin.fir.containingClassLookupTag
import org.jetbrains.kotlin.fir.declarations.*
import org.jetbrains.kotlin.fir.expressions.*
import org.jetbrains.kotlin.fir.references.toResolvedCallableSymbol
import org.jetbrains.kotlin.fir.symbols.FirBasedSymbol

import org.jetbrains.kotlin.fir.FirElement
import org.jetbrains.kotlin.fir.analysis.checkers.toRegularClassSymbol
import org.jetbrains.kotlin.fir.declarations.FirResolvePhase
import org.jetbrains.kotlin.fir.declarations.FirValueParameter
import org.jetbrains.kotlin.fir.declarations.fullyExpandedClass
import org.jetbrains.kotlin.fir.diagnostics.FirDiagnosticHolder
import org.jetbrains.kotlin.fir.expressions.*

    * Add support for type annotations using `Optional` as in `param: Optional[str] = None`. New documentation: [Optional type declarations](https://fastapi.tiangolo.com/tutorial/query-params/#optional-type-declarations).
    * PR [#278](https://github.com/tiangolo/fastapi/pull/278).

## 0.26.0

* Separate error handling for validation errors.

contents of the Program, including, for purposes of clarity any new file
in Source Code form that contains any contents of the Program. Modified
Works shall not include works that contain only declarations,
interfaces, types, classes, structures, or files of the Program solely
in each case in order to link to, bind by name, or subclass the Program
or Modified Works thereof.