CdmBuilder.endContainer

Pops the stack, completing the current container.

The top-of-stack container receives any metadata that was set on it before startObject/startArray/startTag was called (via setLocation, setBracketStyle, setLeadingComments, etc.). The completed container becomes the current value. Any pending member state saved when the frame was pushed is restored, so endMember() can attach the container as a value.