code: function getGlotPressFunction( properties ) {
  	var wpFunc = [ '_' ];
  
  	if ( properties.plural ) {
  		wpFunc.push( 'n' );
  	}
  	if ( properties.context ) {
  		wpFunc.push( 'x' );
  	}
  
  	wpFunc = wpFunc.join( '' );
  
  	if ( 1 === wpFunc.length ) {
  		return '__';
  	}
  
  	return wpFunc;
  }
docs: Determine the correct GlotPress i18n function to use based on the input:
  __(), _n(), _nx(), _x()
  @param  {object} properties - properties describing translation request
  @return {string}            returns the function name