WP_Theme_JSON::get_css_variables( array $nodes, string[] $origins ): string

1958	protected function get_css_variables( $nodes, $origins ) {1959		$stylesheet = '';1960		foreach ( $nodes as $metadata ) {1961			if ( null === $metadata['selector'] ) {1962				continue;1963			}1964 1965			$selector = $metadata['selector'];1966 1967			$node                    = _wp_array_get( $this->theme_json, $metadata['path'], array() );1968			$declarations            = static::compute_preset_vars( $node, $origins );1969			$theme_vars_declarations = static::compute_theme_vars( $node );1970			foreach ( $theme_vars_declarations as $theme_vars_declaration ) {1971				$declarations[] = $theme_vars_declaration;1972			}1973 1974			$stylesheet .= static::to_ruleset( $selector, $declarations );1975		}1976 1977		return $stylesheet;1978	}