code: def parse_const_value(parser):
      return parse_value_literal(parser, True)
  
imports: from .None import ast
  from ..error import GraphQLSyntaxError
  from .lexer import Lexer, TokenKind, get_token_desc, get_token_kind_desc
  from .source import Source
label_desc: Use image node_id 30 for calling a global function with example usage: parse_const_value(parser) and returns: parse_value_literal