private void validateExternalPath(String path) throws InvalidInputException {
		if (path == null) {
			return; // null is an allowed value (used to clear)
		}

		int len = path.length();
		if (len == 0 || path.charAt(0) != FileSystem.SEPARATOR_CHAR) {
			throw new InvalidInputException(
				"Absolute path must begin with '" + FileSystem.SEPARATOR_CHAR + "'");
		}
	}
Removes the external location at the given external address
@param externalAddr the address at which to remove the external location.
@return true if external location was successfully removed else false
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/external/ExternalManagerDB.java