WP_Theme_JSON::get_merged_preset_by_slug( array $preset_per_origin, string $value_key )

Source

File: wp-includes/class-wp-theme-json.php

private static function get_merged_preset_by_slug( $preset_per_origin, $value_key ) {
		$result = array();
		foreach ( self::VALID_ORIGINS as $origin ) {
			if ( ! isset( $preset_per_origin[ $origin ] ) ) {
				continue;
			}
			foreach ( $preset_per_origin[ $origin ] as $preset ) {
				/*
				 * We don't want to use kebabCase here,
				 * see https://github.com/WordPress/gutenberg/issues/32347
				 * However, we need to make sure the generated class or CSS variable
				 * doesn't contain spaces.
				 */
				$result[ preg_replace( '/\s+/', '-', $preset['slug'] ) ] = $preset[ $value_key ];
			}
		}
		return $result;
	}