code: def create_database(self, tree):
      database_name = None
      if_not_exists = False
      engine = None
      param_dict = {}
  
      for child in tree.children:
          if isinstance(child, Tree):
              if child.data == "if_not_exists":
                  if_not_exists = True
              elif child.data == "uid":
                  database_name = self.visit(child)
              elif child.data == "create_database_engine_clause":
                  engine, param_dict = self.visit(child)
  
      create_stmt = CreateDatabaseStatement(
          database_name, if_not_exists, engine, param_dict
      )
      return create_stmt
  
imports: from lark import Tree
  from evadb.catalog.catalog_type import ColumnType, NdArrayType, VectorStoreType
  from evadb.expression.tuple_value_expression import TupleValueExpression
  from evadb.parser.create_index_statement import CreateIndexStatement
  from evadb.parser.create_statement import ColConstraintInfo, ColumnDefinition, CreateDatabaseStatement, CreateJobStatement, CreateTableStatement
  from evadb.parser.table_ref import TableRef
  from evadb.parser.types import ColumnConstraintEnum
label_desc: Use image node_id 1 for calling the CreateDatabase obj's underlying member method code with example usage: obj.create_database(tree) and returns: create_stmt