wffweb/src/main/java/com/webfirmframework/wffweb/css/file/AbstractCssFileBlock.java
Map<String, CssProperty> getCssPropertiesAsMap(final boolean rebuild) {
        if (rebuild || !loadedOnce) {
            synchronized (cssProperties) {
                if (rebuild || !loadedOnce) {
                    cssProperties.clear();
                    load(cssProperties);
                    loadedOnce = true;
                    setModified(true);
                }
            }
        }
        return cssPropertiesAsMap;
    }
Map<String, CssProperty> getCssPropertiesAsMap(final boolean rebuild) {
        if (rebuild || !loadedOnce) {
            synchronized (cssProperties) {
                if (rebuild || !loadedOnce) {
                    cssProperties.clear();
                    load(cssProperties);
                    loadedOnce = true;
                    setModified(true);
                }
            }
        }
        return cssPropertiesAsMap;
    }
rebuild true to rebuild, the load method will be invoked again.

@return the cssProperties as map with key as the cssName and value as
{@code CssProperty}.
@since 1.0.0
@author WFF