How to add multiple Standard SQL functions within JPQL

Question

Is it possible to add multiple SQL functions within JPQL ? (Spring Boot application)

By using MetadataBuilderContributor I succeded to add only one. Is there any way to add more ?

Current code:

public class SqlFunctionsMetadataBuilderContributor implements MetadataBuilderContributor {

    @Override
    public void contribute(MetadataBuilder metadataBuilder) {
        SQLFunction sqlFunction = new StandardSQLFunction("group_concat", StandardBasicTypes.STRING);
        metadataBuilder.applySqlFunction("group_concat", sqlFunction);
    }
}

application.properties:

spring.jpa.properties.hibernate.metadata_builder_contributor = com.bfp.configuration.strategies.SqlFunctionsMetadataBuilderContributor