public ProgramManager getPm() {
		return pm;
	}
Returns an OpenWithTarget, or null, that represents a running {@link ProgramManager}.

@param tool a {@link PluginTool}
@return a {@link OpenWithTarget}, or null if there is no open {@link ProgramManager}
Ghidra/Features/Base/src/main/java/ghidra/plugins/fsbrowser/OpenWithTarget.java