Wrapper base class for OpenXR Spatial Capability Configuration headers. Wrapper base class for OpenXR Spatial Capability Configuration headers. This class needs to be implemented for each capability configuration structure usable within OpenXR's spatial entities system. Return a pointer (encoded as an [code]int64_t[/code]) to a struct holding the spatial capability configuration data. The memory for this struct should remain accessible as long as this object remains instantiated. Return [code]true[/code] if this object contains a valid configuration that can be retrieved when calling [method _get_configuration]. Returns [code]true[/code] if this object contains a valid configuration that can be used when calling [method OpenXRSpatialEntityExtension.create_spatial_context].