JsonMap.keys() paths are not escaped to enforce literal interpretation #57
Description
Many methods within JsonMap indirectly rely the paths (segments) returned by keys(). If such a path segment matches the conditions that have a special interpretation they will be misunderstood by the get(String) because they have to be taken literally.
For example, when a path is foo.{x}.bar the segments from splitting at . are foo, {x}, bar. {x} is then misunderstood as x because of the special syntax to "quote" member access by enclosing a path in curly braces.
Similar issues might surface in other API methods.
To circumvent this either any method returning a path must "escape" it to indicate literal interpretation or the special syntax needs to be adjusted to avoid such clashes in other ways.