class_docstr: Negates a numeric value.
  
  Examples:
      >>> negate = Negate()
      >>> negate([1.0, 23.2, -7.0]).tolist()
      [-1.0, -23.2, 7.0]
code: def get_function(self):
      def negate(vals):
          return vals * -1
  
      return negate
  
imports: from woodwork.column_schema import ColumnSchema
  from featuretools.primitives.base import TransformPrimitive
  from featuretools.utils.gen_utils import Library
label_desc: Use image node_id 1 for calling the Negate obj's underlying member method code with example usage: obj.get_function() and returns: negate, unknown