def define_fact(name, &block)
      add Schema::Builders::FactBuilder.new(self).build(name, &block)
    end
def define_fact(name, &block)
      add Schema::Builders::FactBuilder.new(self).build(name, &block)
    end
Defines a fact table named +name+ in this schema.

 @see Chicago::Schema::Builders::FactBuilder
 @return [Chicago::Schema::Fact] the defined fact.
 @raise Chicago::MissingDefinitionError