code: function customPostMetadataToProductAttributes( metadata ) {
  	const productAttributes = {};
  
  	metadata.forEach( ( { key, value } ) => {
  		const schemaKey = metaKeyToSchemaKeyMap[ key ];
  		if ( ! schemaKey ) {
  			return;
  		}
  
  		// If the property's type is marked as boolean in the schema,
  		// convert the value from PHP-ish truthy/falsy numbers to a plain boolean.
  		// Strings "0" and "" are converted to false, "1" is converted to true.
  		if ( metadataSchema[ schemaKey ].type === 'boolean' ) {
  			value = !! Number( value );
  		}
  
  		productAttributes[ schemaKey ] = value;
  	} );
  
  	return productAttributes;
  }
docs: Convert custom post metadata array to product attributes
  @param { Array } metadata Array of post metadata
  @returns { Object } properties extracted from the metadata, to be merged into the product object