code: def entry_env(self, default_value=None):
      if default_value is None:
          return {
              "global": self.global_type,
              "va": self.row_type,
              "sa": self.col_type,
              "g": self.entry_type,
          }
      else:
          return {
              "global": default_value,
              "va": default_value,
              "sa": default_value,
              "g": default_value,
          }
  
imports: import pprint
  from hail.typecheck import typecheck_method, sequenceof
  from hail.utils.java import escape_parsable
  from hail.expr.types import dtype, tstruct
  from hail.utils.java import jiterable_to_list
label_desc: Use image node_id 20 for calling the tmatrix obj's underlying member method code with example usage: obj.entry_env(default_value) and returns: dict, dict