extendWithTemplate
open fun extendWithTemplate(object: <Error class: unknown class>, templateType: <Error class: unknown class>, buffer: String, length: Long): <Error class: unknown class><Boolean>
Main private entry point for building composite components from template XML.
This is exported purely to let gtk-builder-tool validate templates, applications have no need to call this function.
Return
A positive value on success, 0 if an error occurred
Parameters
object
the object that is being extended
templateType
the type that the template is for
buffer
the string to parse
length
the length of @buffer (may be -1 if @buffer is nul-terminated)