An application that can plot data in PlotML format from a URL or
from files specified on the command line, and can then permit the
user to edit the plot.
Given a legend string, return the corresponding dataset or -1 if no
legend was added with that legend string
The legend would have been set by addLegend().
Print the following to stderr:
this exception, its stack trace and if the cause
exception is known, print the cause exception and the
cause stacktrace.
If the string is longer than length characters,
split the string up by adding newlines in all
newline delimited substrings that are longer than length
characters.
If the contents of this dialog implements the CloseListener
interface, then notify it that the window has closed, unless
notification has already been done (it is guaranteed to be done
only once).