private static void lazyInit ( ) { if ( components == null ) { components = new HashSet < Component > ( ) ; nonTerminalComps = new HashMap < Set < String > , Component > ( ) ; nTerminalAminoAcids = new HashMap < Set < String > , Component > ( ) ; cTerminalAminoAcids = new HashMap < Set < String > , Component > ( ) ; } }
Lazy initialization of the static variables .