```ruby
module Storey
  class GenDumpCommand

    easy_class_to_instance

    def initialize(options={})
      @options = options
      if @options[:database].blank?
        raise ArgumentError, 'database must be supplied'
      end
    end

    def execute
      switches = {}
      switches['schema-only'] = nil if @options[:structure_only]
      switches['no-privileges'] = nil
      switches['no-owner'] = nil
      switches['host'] = @options[:host] if @options[:host].present?
      switches['username'] = @options[:username] if @options[:username].present?
      switches[:file] = Shellwords.escape(@options[:file])

      if @options[:schemas]
        schemas = @options[:schemas].split(',')
        schemas_switches = schemas.map do |part|
          Utils.command_line_switches_from({schema: Shellwords.escape(part) })
        end
      end

      command_parts = []
      if @options[:password].present?
        command_parts << "PGPASSWORD=#{@options[:password]}"
      end
      command_parts += ['pg_dump',
                       Utils.command_line_switches_from(switches),
                       schemas_switches,
                       @options[:database]]
      command_parts.compact.join(' ')
    end

  end
end
```

Simplify GenDumpCommand to not use instances of itself
user
```ruby
module Storey
  class GenDumpCommand

    def self.execute(options={})
      if options[:database].blank?
        raise ArgumentError, 'database must be supplied'
      end

      switches = {}
      switches['schema-only'] = nil if options[:structure_only]
      switches['no-privileges'] = nil
      switches['no-owner'] = nil
      switches['host'] = options[:host] if options[:host].present?
      switches['username'] = options[:username] if options[:username].present?
      switches[:file] = Shellwords.escape(options[:file])

      if options[:schemas]
        schemas = options[:schemas].split(',')
        schemas_switches = schemas.map do |part|
          Utils.command_line_switches_from({schema: Shellwords.escape(part) })
        end
      end

      command_parts = []
      if options[:password].present?
        command_parts << "PGPASSWORD=#{options[:password]}"
      end
      command_parts += ['pg_dump',
                       Utils.command_line_switches_from(switches),
                       schemas_switches,
                       options[:database]]
      command_parts.compact.join(' ')
    end

  end
end
```
assistant