ICssProperties
Represents a set of CSS properties.
Gets the value of the property with the given name.
Gets the number of properties in the declaration.
Gets the full property model for the given property name.
Returns the optional priority, "important" or null, if no priority
has been set.
Gets the value of a property with the given name.
Removes the property with the given name and returns its value.
Sets a property with the given name and value. Optionally the
priority can be set to "important" or left empty.