WP_Style_Engine_CSS_Declarations::add_declaration( string $property, string $value, array $options = array() ): WP_Style_Engine_CSS_Declarations

69	public function add_declaration( $property, $value, $options = array() ) {70		// Sanitizes the property.71		$property = $this->sanitize_property( $property );72		// Bails early if the property is empty.73		if ( empty( $property ) ) {74			return $this;75		}76 77		// Bail early if value is not a string. Prevents fatal errors from malformed block markup.78		if ( ! is_string( $value ) ) {79			return $this;80		}81 82		// Trims the value. If empty, bail early.83		$value = trim( $value );84		if ( '' === $value ) {85			return $this;86		}87 88		$options = wp_parse_args(89			$options,90			array(91				'important' => false,92			)93		);94		$options = array_filter( $options );95 96		// Adds the declaration property/value pair.97		$this->declarations[ $property ] = $value;98		if ( $options ) {99			$this->declaration_options[ $property ] = $options;100		} else {101			unset( $this->declaration_options[ $property ] );102		}103 104		return $this;105	}