public ResolvedType getContainerItemType() {
        ResolvedType targetType = this.getType();
        return targetType == null ? null : this.getContext().getContainerItemType(targetType);
    }
Identify the element/item type of the given {@link SchemaKeyword#TAG_TYPE_ARRAY}.
<br>
This is equivalent to calling: {@code scope.getContext().getContainerItemType(scope.getType())}

@return type of elements/items
jsonschema-generator/src/main/java/com/github/victools/jsonschema/generator/TypeScope.java