@internal CustomAttributeSet referenced by public / beta APIs

[grigasp]

I can get to CustomAttributeSet through public / beta APIs (e.g. await Property.getCustomAttributes()), but can't use it due to it being @internal. Shouldn't it be public?

itwinjs-core/core/ecschema-metadata/src/Metadata/CustomAttribute.ts

Lines 17 to 29 in 97c5147

	/** @internal */
	export interface CustomAttributeSet {
	[Symbol.iterator]: () => IterableIterator<[string, CustomAttribute]>;
	has(className: string): boolean;
	get(className: string): CustomAttribute | undefined;
	}
	/** @beta */
	export interface CustomAttributeContainerProps {
	customAttributes?: CustomAttributeSet;
	fullName: string;
	schema: Schema;
	}