Bug 188027 PasteAction is diabled
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/Theme.java
StyleElement style = (StyleElement) styles.get( i );
			if ( styleName.equals( style.getFullName( ) ) )
			{
				return style;
			}
		}
		return null;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.DesignElement#checkContent(org.eclipse.birt.report.model.core.Module,
	 *      org.eclipse.birt.report.model.core.ContainerInfo,
	 *      org.eclipse.birt.report.model.core.DesignElement)
	 */
	public List checkContent( Module module, ContainerContext containerInfo,
			DesignElement content )
	{
		List tmpErrors = super.checkContent( module, containerInfo, content );
		if ( !tmpErrors.isEmpty( ) )
			return tmpErrors;
		tmpErrors.addAll( ThemeStyleNameValidator.getInstance( )
				.validateForAddingStyle( (ThemeHandle) getHandle( module ),
						content.getFullName( ) ) );
		return tmpErrors;
	}
	/**
	 * Drops the given css from css list.
	 * 
	 * @param css