public double incrementCount(E key) { return incrementCount(key, 1.0); }
public double decrementCount(E key) { return incrementCount(key, -1.0); }
public double decrementCount(E key, double amount) { return incrementCount(key, -amount); }
public double decrementCount(E key) { return incrementCount(key, -1.0); }
public double incrementCount(E key) { return incrementCount(key, 1.0); }
public double decrementCount(E key, double amount) { return incrementCount(key, -amount); }
public double incrementCount(E key) { return incrementCount(key, 1.0); }
public double incrementCount(E key) { return incrementCount(key, 1.0); }
public double decrementCount(E key, double amount) { return incrementCount(key, -amount); }
public double decrementCount(E key) { return incrementCount(key, -1.0); }