woocommerce_email_subject_customer_invoice

apply_filters('woocommerce_email_subject_customer_invoice') is found 1 times:

• /includes/emails/class-wc-email-customer-invoice.php line 90

  				return apply_filters( 'woocommerce_email_subject_customer_invoice_paid', $this->format_string( $subject ), $this->object, $this );
  			}
  
  			$subject = $this->get_option( 'subject', $this->get_default_subject() );
  			return apply_filters( 'woocommerce_email_subject_customer_invoice', $this->format_string( $subject ), $this->object, $this );
  		}
  
  		/**
  		 * Get email heading.
  		 *
  		 * @return string
  

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