public File getGhidraInstallDir() {
		String ghidraInstallDirProperty = System.getProperty(GHIDRA_INSTALL_DIR_PROPERTY);
		if (ghidraInstallDirProperty != null && !ghidraInstallDirProperty.isEmpty()) {
			return new File(ghidraInstallDirProperty);
		}
		return null;
	}
Gets the installation directory of the Ghidra that launched Eclipse.

@return The installation directory of the Ghidra that launched Eclipse.  Could be null if
  Ghidra did not launch Eclipse, or Ghidra did not pass along it's installation directory to
  Eclipse properly.
GhidraBuild/EclipsePlugins/GhidraDev/GhidraDevPlugin/src/main/java/ghidradev/Activator.java