Method resolveParentTypeMetadataSet

src/type-metadata.ts:912–943

* Resolves parent type metadata set for provided type metadata reflecting inheritance order where the * first element is the current type metadata and the last element is the most abstract parent. This * collection is used to define all properties which are declared for the provided type

(
        typeMetadata: TypeMetadata<any>, 
        parentTypeMetadataSet: Set<TypeMetadata<any>> = new Set<TypeMetadata<any>>()
    )

     * @returns {ReadonlySet<TypeMetadata<any>>} Parent type metadata set.
     */
    private resolveParentTypeMetadataSet(
        typeMetadata: TypeMetadata<any>, 
        parentTypeMetadataSet: Set<TypeMetadata<any>> = new Set<TypeMetadata<any>>()
    ): ReadonlySet<TypeMetadata<any>>
    {
        if (parentTypeMetadataSet.has(typeMetadata))
        {
            return parentTypeMetadataSet;
        }

        parentTypeMetadataSet.add(typeMetadata);

        const typeOptions = typeMetadata.typeOptions;

        const parentTypeArguments = typeOptions.parentTypeArguments === undefined
            ? EMPTY_ARRAY
            : typeOptions.parentTypeArguments;

        const parentTypeMetadatas = this.resolveTypeMetadatas(parentTypeArguments);

        for (let i = parentTypeMetadatas.length - 1; i >= 0; i--)
        {
            this.resolveParentTypeMetadataSet(parentTypeMetadatas[i], parentTypeMetadataSet);
        }

        if (typeMetadata.parentTypeMetadata !== undefined) 
        {
            this.resolveParentTypeMetadataSet(typeMetadata.parentTypeMetadata, parentTypeMetadataSet);
        }
        
        return parentTypeMetadataSet;
    }

    /**
     * Resolved child type metadata set for provided type metadata reflecting inheritance order where the