@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((symbol == null) ? 0 : symbol.hashCode());
		return result;
	}
Set the label and optional namespace associated with an external location.
Any non-existing namespace will be created as a simple namespace within the associated
library.
@param label external location label.  The label may be qualified with a namespace
and best effort will be used to parse it (see {@link SymbolPath}).
If a namespace is not included within label, the current namespace will be preserved.
@param source the source of this external symbol:
Symbol.DEFAULT, Symbol.ANALYSIS, Symbol.IMPORTED, or Symbol.USER_DEFINED
@throws InvalidInputException if the name contains illegal characters (space for example)
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/external/ExternalLocationDB.java