wffweb/src/main/java/com/webfirmframework/wffweb/css/css3/Columns.java
public static boolean isValid(final String cssValue) {
        if (cssValue == null || StringUtil.isBlank(cssValue)) {
            return false;
        }

        final String[] cssValueParts = StringUtil.splitBySpace(cssValue);

        ColumnWidth columnWidth = null;
        ColumnCount columnCount = null;

        for (final String eachPart : cssValueParts) {
            boolean invalid = true;
            if (columnWidth == null && ColumnWidth.isValid(eachPart)) {
                columnWidth = new ColumnWidth(eachPart);
                invalid = false;
            } else if (columnCount == null && ColumnCount.isValid(eachPart)) {
                columnCount = new ColumnCount(eachPart);
                invalid = false;
            }
            if (invalid) {
                return false;
            }
        }

        return columnWidth != null || columnCount != null;
    }
public static boolean isValid(final String cssValue) {
        if (cssValue == null || StringUtil.isBlank(cssValue)) {
            return false;
        }

        final String[] cssValueParts = StringUtil.splitBySpace(cssValue);

        ColumnWidth columnWidth = null;
        ColumnCount columnCount = null;

        for (final String eachPart : cssValueParts) {
            boolean invalid = true;
            if (columnWidth == null && ColumnWidth.isValid(eachPart)) {
                columnWidth = new ColumnWidth(eachPart);
                invalid = false;
            } else if (columnCount == null && ColumnCount.isValid(eachPart)) {
                columnCount = new ColumnCount(eachPart);
                invalid = false;
            }
            if (invalid) {
                return false;
            }
        }

        return columnWidth != null || columnCount != null;
    }
checks the given css value is valid for this class. It does't do a strict
validation.

@param cssValue
@return
@since 1.0.0
@author WFF