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declare namespace ESTree {
    interface FlowTypeAnnotation extends Node {}

    interface FlowBaseTypeAnnotation extends FlowTypeAnnotation {}

    interface FlowLiteralTypeAnnotation extends FlowTypeAnnotation, Literal {}

    interface FlowDeclaration extends Declaration {}

    interface AnyTypeAnnotation extends FlowBaseTypeAnnotation {}

    interface ArrayTypeAnnotation extends FlowTypeAnnotation {
        elementType: FlowTypeAnnotation;
    }

    interface BooleanLiteralTypeAnnotation extends FlowLiteralTypeAnnotation {}

    interface BooleanTypeAnnotation extends FlowBaseTypeAnnotation {}

    interface ClassImplements extends Node {
        id: Identifier;
        typeParameters?: TypeParameterInstantiation | null;
    }

    interface ClassProperty {
        key: Expression;
        value?: Expression | null;
        typeAnnotation?: TypeAnnotation | null;
        computed: boolean;
        static: boolean;
    }

    interface DeclareClass extends FlowDeclaration {
        id: Identifier;
        typeParameters?: TypeParameterDeclaration | null;
        body: ObjectTypeAnnotation;
        extends: InterfaceExtends[];
    }

    interface DeclareFunction extends FlowDeclaration {
        id: Identifier;
    }

    interface DeclareModule extends FlowDeclaration {
        id: Literal | Identifier;
        body: BlockStatement;
    }

    interface DeclareVariable extends FlowDeclaration {
        id: Identifier;
    }

    interface FunctionTypeAnnotation extends FlowTypeAnnotation {
        params: FunctionTypeParam[];
        returnType: FlowTypeAnnotation;
        rest?: FunctionTypeParam | null;
        typeParameters?: TypeParameterDeclaration | null;
    }

    interface FunctionTypeParam {
        name: Identifier;
        typeAnnotation: FlowTypeAnnotation;
        optional: boolean;
    }

    interface GenericTypeAnnotation extends FlowTypeAnnotation {
        id: Identifier | QualifiedTypeIdentifier;
        typeParameters?: TypeParameterInstantiation | null;
    }

    interface InterfaceExtends extends Node {
        id: Identifier | QualifiedTypeIdentifier;
        typeParameters?: TypeParameterInstantiation | null;
    }

    interface InterfaceDeclaration extends FlowDeclaration {
        id: Identifier;
        typeParameters?: TypeParameterDeclaration | null;
        extends: InterfaceExtends[];
        body: ObjectTypeAnnotation;
    }

    interface IntersectionTypeAnnotation extends FlowTypeAnnotation {
        types: FlowTypeAnnotation[];
    }

    interface MixedTypeAnnotation extends FlowBaseTypeAnnotation {}

    interface NullableTypeAnnotation extends FlowTypeAnnotation {
        typeAnnotation: TypeAnnotation;
    }

    interface NumberLiteralTypeAnnotation extends FlowLiteralTypeAnnotation {}

    interface NumberTypeAnnotation extends FlowBaseTypeAnnotation {}

    interface StringLiteralTypeAnnotation extends FlowLiteralTypeAnnotation {}

    interface StringTypeAnnotation extends FlowBaseTypeAnnotation {}

    interface TupleTypeAnnotation extends FlowTypeAnnotation {
        types: FlowTypeAnnotation[];
    }

    interface TypeofTypeAnnotation extends FlowTypeAnnotation {
        argument: FlowTypeAnnotation;
    }

    interface TypeAlias extends FlowDeclaration {
        id: Identifier;
        typeParameters?: TypeParameterDeclaration | null;
        right: FlowTypeAnnotation;
    }

    interface TypeAnnotation extends Node {
        typeAnnotation: FlowTypeAnnotation;
    }

    interface TypeCastExpression extends Expression {
        expression: Expression;
        typeAnnotation: TypeAnnotation;
    }

    interface TypeParameterDeclaration extends Node {
        params: Identifier[];
    }

    interface TypeParameterInstantiation extends Node {
        params: FlowTypeAnnotation[];
    }

    interface ObjectTypeAnnotation extends FlowTypeAnnotation {
        properties: ObjectTypeProperty[];
        indexers: ObjectTypeIndexer[];
        callProperties: ObjectTypeCallProperty[];
    }

    interface ObjectTypeCallProperty extends Node {
        value: FunctionTypeAnnotation;
        static: boolean;
    }

    interface ObjectTypeIndexer extends Node {
        id: Identifier;
        key: FlowTypeAnnotation;
        value: FlowTypeAnnotation;
        static: boolean;
    }

    interface ObjectTypeProperty extends Node {
        key: Expression;
        value: FlowTypeAnnotation;
        optional: boolean;
        static: boolean;
    }

    interface QualifiedTypeIdentifier extends Node {
        qualification: Identifier | QualifiedTypeIdentifier;
        id: Identifier;
    }

    interface UnionTypeAnnotation extends FlowTypeAnnotation {
        types: FlowTypeAnnotation[];
    }

    interface VoidTypeAnnotation extends FlowBaseTypeAnnotation {}
}